Common Air Handler Problems. Everyone loves to be comfortable so when there is a problem with the HVAC system we can become very uncomfortable. The air handler in the has electrical and mechanical components in it that can experience problems from time to time. Some of the most common problems with air handlers can help you identify the problem and possibly fix the issue.

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Although some of the issues listed will need the attention of a professional HVAC technician to make the repair to the air handler. After all, an HVAC technician will have all the tools and likely the parts available to make a fast and efficient repair. Furthermore, since every is different it is possible the problems described here do not apply to your situation.

Clear Duct System and Good Airflow Common Air Handler ProblemsSince the AHU is the central unit that moves the air throughout the ductwork it is important to make sure nothing obstructs the airflow through the air handler such as. A regular air filter maintenance schedule will help you maintain good air flow through the. It also helps keep the air handler components inside clean and free of debris and dust.

First Co UCQB Series Upflow Air Handler. HVAC equipment products sold to licensed contractors only. Products sold in select areas only, please contact. The company has established the First Community Bank Profit Sharing Plan, a qualified 401(k) defined contribution plan, pursuant to which the company makes matching and discretionary contributions on behalf of each of the executive officers. The company also maintains and pays premiums on behalf of each executive officer under a life insurance.

If you maintain good filter maintenance you will not have to worry about a or any other components clogging with dust or debris. Furthermore, this includes. Dusty and dirty components lead to big problems which can cause your along with other major issues.

Schedule is easy especially if you have a good digital thermostat. Many of the newer have air filter change reminders.

Maintain good filter maintenance and prevent several future problems. Dirty filters can lead to. Finally, the problem can become catastrophic under the worst situations.Blower Motor Failure Common Air Handler ProblemsThe next most common problem that can occur with an air handler is a failure of a whether it be the blower motor or something else that causes the blower motor to fail. It could be a bad relay, control board, or the blower motor itself.

It could also be the blower wheel. These are AHU (Air Handling Unit) problems that need the attention of a professional HVAC technician.

An HVAC technician can identify the problem quickly and make the repair. It may require ordering parts or the part may be available on the service truck but the problem will be resolved quickly and efficiently. Proper Filter Maintenance Common Air Handler ProblemsMost of the issues described can be avoided with. Even the blower motor failure can be enhanced by bad airflow resulting from no regular filter maintenance. It makes the motor work harder creating more heat and pulling more amperage which costs you more electricity costs.

The dirt from dust that builds up also hurts the motor and creates more heat which can have detrimental effects on the motor. Consequently, the lesson is to keep a good clean filter in the system and you will reduce any problems that may occur with your air handler. Air Handling Units HVAC AirflowAgain, it is recommended that an HVAC professional do this work. Make sure you read the High Performance HVAC disclaimer before proceeding. A professional will have all the proper HVAC tools to complete the job quickly and efficiently. It does not matter what type of equipment you have. You can have a Trane, Goodman, York, Rheem, or Carrier HVAC system and it all needs to be maintained.

If you decide to do it yourself make sure you follow the safety procedures as noted on the about cutting power to the air handling unit before attempting to clean the evaporator coils. Once you have turned the power supply off to the air handler, open the air handler panel where the suction and liquid lines run into the air handling unit. Be very careful not to bend or crimp these lines or any lines in the air handlers. Another thing to avoid is the fins on the coils. Do not bend them. That would defeat the purpose of cleaning the coils because it will reduce the amount of air flowing through the coils.

Plus the evaporator fins can cut you. Furthermore, check the before you begin this procedure. Basic Check  Common Air Handler ProblemsSee condensate drain section below for more information on this subject. Soak the air handling unit evaporator coil with a soap and water solution.

Professionals use an industrial strength coil cleaner which may be available at some hardware stores. Let this solution soak for a few minutes. Then take a rag and wipe as much dust off the surface of the evaporator coils as possible.

Repeat these steps until the evaporator coils look clean. Take a flashlight and look between the fins on the evaporator coils.

The evaporator fin on the coil should appear to be clean. If not, soak the evaporator coils again and use a brush with light bristles to brush the evaporator coils.Remove as much dust, dirt, and debris as possible from the evaporator coil. Remember there are two sides to the coil and make sure both sides are clean. The side that will most likely be dirty will be the side where the return air flow comes from.

If your evaporator coils are clean and the rest of your air handler components are operating normally you should have a nice cool summer inside your home no matter what the weather is outside. Checking the Air Handler Blower Motor  Common Air Handler ProblemsThe is comprised of different components in most units. It has an electric motor, a squirrel cage blower wheel, and a cage typically referred to as a squirrel cage.

Some air handling units have belt driven motors and most have capacitors for the air handler electric motor and typically the only required HVAC maintenance on the blower is oiling the air handler blower motor if it has oil ports or checking the belt if you have a belt driven motor. Not all blower motors have oil ports. These blower motors use sealed bearings and never require oil. The air handler blower motors that do have oil ports usually have little plastic dust caps that can be removed so that oil can be applied. Checking the Air Handler Condensate Lines Common Air Handler ProblemsChecking the air conditioning air handler condensate lines is especially important if your air handler is located in the attic. Since the air conditioner evaporator coil (inside the air handling unit) operates at a temperature less than the dew point, it will condense the moisture from the air.

This air handling unit coil is designed to allow the moisture to drip into an evaporator condensation pan. Most condensation pans have a 3/4 inch PVC line attached to them that allows the moisture to drain to the outside of the house.The PVC condensation drain line often becomes clogged with algae and muck. Consequently, it needs to be blown or flushed out from time to time. If your air handler is in an attic it should have a secondary pan to catch the water in case the primary condensation pan or condensation drain line gets clogged. Typical items that clog condensation lines are algae, muck, and trash like insulation from the attic. You can treat the evaporator pan and condensation drain lines with algaecide that should work throughout the season.

Double Dang Sure  Common Air Handler ProblemsFor double protection, I recommend that all secondary condensation pans have float switches installed. The float switch will cut the air handling unit off if the secondary condensation pan starts to overfill. This will save you from buying a ceiling from a condensation leak. Float switches can be installed by your local HVAC service company. Check to make sure that the air conditioner condensate line is not plugged.

You can do this by pouring water in the air conditioner condensation pan. If it drains fast then the line should be okay.If it drains slowly or not at all then the condensation drain line is plugged or beginning to plug. I often find the end of the line outside and take a hose and flush the line. You must be careful if you do this procedure. You can flood the condensation pan and cause water damage. This will clean the line in most cases.

Additionally, you can make sure that the condensation drain line has a downward slant to it. Sometimes people place things in the attic on the condensation drain lines and it won’t drain. If you’ve checked all that and the condensation water still doesn’t drain properly you need to call an HVAC professional. Professional HVAC Technician Maintenance  Common Air Handler ProblemsThe HVAC professional should have all the necessary HVAC tools to blow the condensation line properly. All of these checks can be made by your local Heating and Air Conditioning HVAC company. Just call and ask for a spring tune-up or an HVAC maintenance agreement. A little HVAC preventive maintenance on your HVAC system can save you a lot of money in the future.

Take the time to have this HVAC maintenance done and save yourself from the expense and hardship that comes with HVAC breakdowns and HVAC component failure. In-depth HVAC information:.HVAC Duct Work should be sealed and insulated. Then the insulation should be sealed to provide a vapor barrier. Commercial HVAC ductwork commissioning typically requires a pressure test to make sure the ductwork was correctly installed and meets specifications. Refrigeration  Common Air Handler Problems.By the time it (HVAC refrigerant) reaches the end of the coils it should have absorbed enough heat to change it from a liquid to a vapor.

What are the reasons why the coil wouldn’t absorb enough heat to change the state of the refrigerant?. Dirty Filters. Dirty Coils. Collapsed Duct.

Too many supply vents closed off. A bad blowerThe bottom line is airflow.

There must be the proper amount of airflow across the coils for your system to operate efficiently. Take this one step further. If you have one of the aforementioned problems listed above and the refrigerant remains a liquid, what happens?

Refrigerant leaving the evaporator is on a non-stop trip to the compressor. It is important that the refrigerant has changed from a liquid to a vapor before it reaches the compressor. The liquid doesn’t compress and can cause major problems if it reaches the compressor. It’s called liquid slugging and can cause irreparable damage to the compressor. HVAC Variable Speed Motors Common Air Handler ProblemsToday’s technology, while being more expensive to purchase up front, can pay for itself over time in energy savings by increasing efficiency.

First Company Air Handler Reviews

Variable speed blower motors not only increase the efficiency but they also increase your comfort. Conventional HVAC systems are designed to maintain comfort based basic parameters. The parameters include a peak load of 95 degrees Fahrenheit outside temperature with 75 degrees Fahrenheit and 50 percent relative humidity inside.That means even when the temperature outside is 80 degrees Fahrenheit the system will still operate full blast. It will run as if it were 95 degrees Fahrenheit outside. Imagine you had a car that only did one speed. Sure it would get you there but how efficient would it be? Both, and HVAC systems have specifically designed systems with variable speed blowers for greater efficiency and humidity removal.

Other manufacturers have followed their lead. Variable Speed ECM Motors Bonuses  Common Air Handler Problemsalong with two-stage compressors and multi-stage furnaces offer better control and efficiency. These components and controls help your system run at the speed it needs to run. The appropriate speed to meet the current load demand. Temperatures are even and the equipment cycles per hour are reduced.

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In both the summer and winter the motor runs at a lower speed until the demand increases. Then it ramps up to meet that higher demand. It only runs or consumes enough energy to meet the current demand. Furthermore, other benefits of having variable speed motors are:. Soft-start capabilities. Quieter operation (research indicates up to 50 percent less noise than conventional blowers).

Better humidity control which adds increased comfort in the summer. On higher SEER condensing units, variable speed motors are used for the condenser fan motor.

When used in conjunction with multi-stage furnaces AFUE ratings increase.Different manufacturers offer different options with available speeds and control of the variable speed motor. It is important to compare when shopping for new equipment. Use High Performance HVAC links page to see the different options available from different manufacturers. Variable speed motors used with other high-efficiency options is definitely worth the extra cost of installation. Consequently, it will pay for itself by saving you money in energy costs over the long term. Conclusion  Common Air Handler ProblemsAgain, remember that you can have the best, most efficient HVAC machine any manufacturer can design. However, if your ductwork is sub-standard and leaking you’re losing the efficiency.

The efficiency you gained by having the best system installed. Ductwork deficiencies are probably the most overlooked problems with an air conditioning and heating HVAC system. Before you spend a ton of money having the best HVAC system installed, check the ductwork. Finally, make sure the.Common Air Handler Problems & Maintenance Schedules. Have 4 ton and 5 ton rheem air handlers in attic. Also 2 drain lines.

4 ton never has a problem and does not get water in overflow pan. 5 ton is always giving problems water in overflow pan and comes out second drain. Stops running because water high in pan. Have serviced every 3 months and it still happens.

Air cond company keeps saying happens because in attic. This I do not understand because 4 and 5 ton sit side by side in attic and only one acts up. Also main drain is not closed as 4 ton drains well.

Units are 5 yrs old and I have been fighting this problem for last 3 yrs. Now they talk about putting a pump in attic to drain 5 ton. Doesn’t the unit have a condensate pump built in it.

Not sure what you are talking about concerning the electrical valves except maybe a solenoid to prevent refrigerant migration that is installed in some systems based on specific circumstances. However, the electrical part is likely rated for it and water proof. Besides, if it is insulated correctly then no moisture should be forming on the pipe. The insulation should provide a vapor barrier to keep moisture out. The vapor comes from moisture in the air and the insulation keeps that out.The drain pan can be replaced. Sometimes, depending on your system, the pan may have to be custom made at a sheet metal shop.

As far as it being simple I cannot say without seeing it. Sometimes it can be done in an hour and sometimes it may take longer depending on the situation and how the air handler is installed. You can take a photo and send it to me. Upload your photo here. Ignore the guest post part and use the uploader to send me the photo. The previous owner of my house did his own duct work which leads from the AHU (located in a lower attic) all the way up to the higher attic. The duct work is all folded together in the higher attic which provides air conditioning to all the upper floor bedrooms and bathrooms.Recently, I found out there is mold in the AHU as well as the ducts.

I have regular maintenance done on my unit so I’m wondering why the mold wasn’t discovered earlier and/or cleaned up. Now I’m told I have to replace everything! The new air handler unit will be installed in the upper attic instead of the lower attic.I’m not sure if this is the best way because I’m concerned about the unit being right above the bedrooms. The upper attic is a crawlspace with lots of insulation.

I’m also worried about leaking ceilings. What would you recommend?

I think I would trust the HVAC designer in this case as long as they are a reputable firm they likely know whats best. Now as far as the air handler being above the bedrooms. They only thing I can think of is any noise it makes which should be very minimal provided proper installation. If it is installed on the floor a secondary condensation pan should be installed under it. Any reputable HVAC company will put this drain pan under the air handler especially when installed in any attic. Next they will will put rubber pads under the air handler to avoid vibration issues which would cause noise if these rubber pads were not installed under the unit.Next is the issue of water leaks from the air handler.

Again, if it is installed properly and by code the air handler will have a primary drain and a secondary drain. The secondary drain should drain somewhere where you will notice it if water is draining from the secondary drain. If you see water dripping from the secondary drain then you know there is a problem with the primary drain. This should not occur as the primary drain should have a sensor installed in it that detects clogs. This will shut the unit down. Next, installed in the pan under the air handler should be a float switch.

This switch is designed to shut the unit down if water starts filling the secondary pan. So several precautions are taken to avoid overflow and damage to your ceiling. In any case where I have found damaged ceilings it was because these precautions were not used ie improper installation.Next, regular maintenance should be done. This is for various reasons but if regular maintenance is performed then a professional will see the unit on a regular basis and if any problems do exist then he can take of the problems before they cause severe damage.Lastly, mold in your ductwork. First make sure the new ductwork is properly insulated and has a good vapor barrier.

Next I would purchase additional features for the system to prevent any mold in the future. A UV air cleaner and an electronic air cleaner along with the normal filtering media you use would be a good thing to have for the duct work to prevent the growth of mold in the system. Air handlers are dark and moist and you will get some mold growth inside the system especially in the primary drain. That is where regular maintenance comes in. When I do maintenance on any system I place some tables in the system. You can find the tablets here –Those tablets are designed to kill algae and mold that can get in the system. They will also prevent condensation drains from being plugged up by algae.

All this information can be found on this website. Thanks and good luck to you!!! Yes, they are as long as the capacity of the coil to the condenser match it will work. See this a lot. It is not uncommon to replace Brand A air handler with Brand B condenser or vice versa. I would definitely make sure to take care of the power surge issue so you don’t have a similar problem. As far as the heat, I would call the company that installed the new condenser and have them take a second look.

If they balk or refuse I would call another contractor to come out and check everything out. It could be something simple or something major. Either way, the installing contractor, as most contractors, should have given you a one year warranty on their work. Especially a job like this.

HVAC Random Tip BoxHVAC Tip - Ceiling Fans Save Energy: Ceiling fans installed strategically in your home or business can save you in air conditioning energy costs in the summer. The draft effect from the fan will allow you to raise the thermostat setting by up to 4 degrees and still remain comfortable. Make sure you purchase ceiling fans with energy efficient motors and blade designs.

Some ceiling fans have inefficient motors and bad blade designs that will reduce the energy savings you can realize. A qualified electrician can install ceiling fans in your home or business and you can enjoy the savings and compliment your HVAC system.

Air Handling Units are basically referred to as a generic term for anything or any device which is involved in the transportation, heating or cooling of air. After the heating or cooling of the air the air stream is moved forward or directed to the required placed through air ducts which includes rooftop units and furnaces.where asThe fan coil units are smaller and self contained than the AHU's. And the major difference between AHU and FCU lies in the fact that in FCU's there is no ducting involved for the movement of air.

In the FCU's the fan in the internal section of the FCU carries out the function of moving the air over a heated or cooled coil and then directly moving out the air into the surrounding air without the use of any ducts.The FCU's can also be used in the case of water also where as AHU's deal with air only.The working of an FCU is as follows. An FCU consists of a coil and a fan. It receives air from a central plant which is cooled or heated up by the10 years agoSource: Best Answer10ASKED BYthanks Alec.now i understand.10 years agoSource:00. ENGINEERING.com does not provide engineering advice. The Ask@ service is a forum for members to exchange ideas relating to the world of engineering. We caution users not to accept any responses that they receive without further validation, and not to rely on any engineering advice that they may get from other members of the Ask@ forum.

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