Why Your Car Air Conditioner is Blowing Warm Air When it is working properly, your cars’ air conditioner is a wonderful thing. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. If your air conditioner is blowing warm air, or just not working properly, it is best to schedule a service ASAP to maximize your comfort. Schedule Your Next A/C System Service Automotive A/C systems have certain intricacies in their design that render them difficult to repair without the proper equipment and knowledge base. On top of that, there are certain environmental concerns involved with refrigerant that require special attention. We’ve identified three common A/C System issues to help supply you with information on what may be going on with your vehicle. Three Common Occurrences that could Result in your Vehicle’s A/C not Working Properly:Refrigerant Leak A refrigerant leak is unique in the sense that refrigerant evaporates instantly into a gas once it isn’t under the pressure of your closed loop A/C system.

A/C systems are sealed and therefore don’t require refrigerant top-off’s. If the refrigerant level is low then there is a leak that needs to be addressed Leaks in your A/C don’t result in the normal tell tale puddles of fluid under your vehicle like those of an oil or antifreeze leak. Our certified technicians are trained to search for much less sinister signs of leaks like the oily residue which might be found on or around A/C hose units or connections. air conditioning units home hardwareA refrigerant leak can also occur in the A/C compressor, condenser, and/or evaporator - essentially all of the components of your air conditioning system. best ac unit for rvWe employ state of the art leak detection methods including UV dyes and specialized test equipment to ensure that your car is properly diagnosed the first time and serviced right, complete with our nationwide warranty. split ac outdoor unit installation

Worn out compressor The compressor is the heart of your vehicle’s air conditioning system. Its function is to circulate refrigerant through a series of stages that allow it to remove heat from your vehicles cabin. Similar to many other car parts, the compressor can wear out over time. Due to its complicated design, compressor failure can be attributed to contamination or other failed parts within the system. There are some things that you can do to help prolong the life of your vehicle’s compressor. First, make sure to run the compressor for about 10 minutes once a month in the off season, regardless of the temperature outside. This is easy to in most modern vehicles since they utilize the compressor when the defroster, which is used year round, is activated. Another way is to stop in to Pep Boys for a FREE A/C Quick Check (not available in the state of California) and an associate can give a visual inspection of the compressor to ensure that everything looks in order.Problems with the electrical system The A/C system in your car has a maze of wires complete with fuses, relays and pressure switches that work in unison to provide safe operation under normal operating conditions.

If one of these electrical components fail due to age or defect, the system is designed to shut itself down to prevent damage to itself or unsafe conditions for the operator. Without the proper test equipment and, perhaps more importantly, the experience level of the individual diagnosing the problem, these issues are difficult to isolate. What this Means for You These three common occurrences are by no means a comprehensive list of all of the different things that can go wrong with your vehicle’s air conditioning system. They are also not the only culprits that will cause warm air to blow through your A/C System, but they are the most common. If you have the skills to fix your A/C system yourself, we’re are here to help you with the advice, parts, refrigerants and even the tools needed to do the job. If you rely on others to service your vehicle, do so as soon as possible. Driving in uncomfortable conditions can take your attention off of driving as safely as possible which could result in a potentially dangerous situation for you and your passengers.

Trust Pep Boys to help you keep you cool every step of the way.Double wide mobile homes have a large crossover duct that transfers heated or cooled air from one side to the other. It is one of those items that may be installed by the factory, the dealer or the setup crew. Improperly done it can be the source of many problems and there is lots of room to shift blame. Any time you notice the house is not heating or cooling the same on both halves there is probably a problem with the crossover duct. The crossover duct is another one of those mystery items hidden beneath the house where poor workmanship may take a long time to appear. The duct is not supposed to rest on the ground, it should be well insulated, and it should be connected at both ends with a metal or plastic band and sealed with metalized tape. If you have not checked on yours for a couple of years it would be good to look at it. Duct tape just doesn’t hold forever and you can lose a lot of heat or cool through a leaking, poorly insulated crossover duct.

{ 27 comments… read them below } We are having duct work issues with our double wide. Air blows strong in master bath and in back bedroom, both on the side with the ac/ heater. Air flow is less in the center rooms on that side and almost nonexistant on side b. While I believe the crossover duct may be an issue , I do not understand how it is possible to blow great on both ends and not in the middle. Any help would be greatly appreciated. It’s got to be obstructed somehow. What if you took the register covers off and dropped a really bright light into one of them. Then put a mirror in another. That might let you see a problem. Good luck with it We are getting water in the crossover duct. When this happens we get no air flow to the house, either one side or the other or both- no certain pattern. We have had to pierce the duct, let it drain, then close up the hole. After that the air flows fine. no water has built up but we get sporadic air flow. It will blow somewhat OK for 6-8 hours then not well at all.

We turn the unit off for several hours,then the air will flow again, but not as well as it should. The duct is laying on the ground- as far as we know it always has. Please advise best course of action. Why is water getting in there? Is this a do it yourself kind of fix? If so where can we get a new duct in Tucson AZ. A/C repair is one of my weak points since I live in New Mexico where evaporative coolers are more popular. Your description makes me think the tube which is supposed to drain condensate from the A/C unit is plugged and the water is overflowing into the crossover duct. I would look around and see if you can find and clean it. The second part of your problem makes me wonder if the excess water and reduced flow makes the unit work harder to try and cool the house which then freezes the excess water and prevents air flow. 6-8 hours is probably about the right length of time to let things thaw out. Let me know what you find. there must be a duct issue, I get a/c and heat in in the kitchen, livingroom, and 2 bed rooms.

I do not any thing in the den, back bedroom or the master. all of those rooms are on one side of the trailer. where do I start to look for the problem. I was told to cut open the roof by the vents to locate where the cross or pinch is. All the homes I worked on had the heating/cooling ducts in the floor. On doublewides there is a duct under the floor that takes the hot/cold air to the other side. I presume there is something similar with ducts in the ceiling, but have no experience with it. I have had crossover flex duct problems many times, I bought my DW new in 94. The people that set it up laid the flex duct on the ground, I have done the same every time I have changed it (about 6X) last winter was very cold for TX, The mice came in like crazy, is there something I do or some other type of duct I can put there to help keep the mice out and the cold air in, we have had 27 plus of 3 digit temp and inside the coolest is 85. I have had the AC checked and everything is fine! Any help would be great.

What if you built a mouse proof box to hold the duct? Quarter inch plywood for most of it would keep the weight down so it wouldn’t be hard to install. You could also add extra insulation inside the box and around the duct. How do I find the crossover pipe? Crawl under the house and look for a large plastic tube going from one side to the other. Imagine a dryer exhaust duct only 16″ in diameter and 20 feet long. We have an odor in one bedroom that seems to be comming from the heat duct. It has been there since our home was set up. Is there some way to find out what is going on without spending a fortune ? You might be able to pry up the duct cover and set a mirror at an angle on the bottom. With a bright light that would let you look down the inside of the duct. If that doesn’t work you will have to open the duct at some point and see what you can find. One side of DW gets little to no pressure and other side bliws pic iff walls, checked in all vents with light and mirrors and its clear on both, was told in a estimate that the floor needs to be dropped and another duct put in for $2,000…. i have brand new 4 ton unit and compatable with blower and working great….help

In spite of all the nasty comments about how cheaply mobile homes are built, they ARE carefully engineered. I am certain the ductwork in your home evenly distributed the air when it left the factory. The fact you have to much volume on one side screams blocked duct somewhere. You just haven’t found it yet Has anyone actually crawled under the home and checked out the crossover duct up close and personal? Thats where I would start. Remove the crappy flexduct crossover duct and install a metal crossover. Keep it off the ground, insulate it correctly and make sure the ends are securely zip tied to the openings. This should keep mice and water out, as well as very slightly help with air flow I have double wide – four bedrooms. Problem is one bedroom stays warm at one end and the other end you freeze. Have you always had this problem or is it a recent development? I assume the ducts were engineered properly at the factory and the house was set up correctly.

If this is a recent problem I would be wondering what changed. Is there something in the duct that is blocking some of the flow. Are the problem bedrooms on the same half of the home? It would probably be worth having someone crawl under the home and look for problems. It might also be worth pulling up the vent covers & using a bright light and a mirror to see you can see any issues. If all that checks out it might be worth having your furnace inspected. Could there be badly clogged filters blocking the air flow or some other problem with the furnace? I know nothing about compressor driven air conditioning but could there be something there that is blocking the air flow or diverting it improperly. Let me know when you figure it out. can you replace the crossover duct with metal hvac pipe using 2 12″ ell’s and a pipe in the middle and insulate the outside which would take care of animals eating into the flex crossover I don’t see why not. I have to think the only reason for the flex tube is cost.

Installing a flex tube does not require any cutting, measuring, or other skills so it can be done by the lowest paid guy on the installation crew. I have a dust problem coming up through the vents. It almost looks like insulation. Would you have any way to find the problem or what is causing this? If your duct is made like this one and the inner lining fails you could get pieces of insulation blown loose. I moved into a double wide one side of house blows hard and cold other barely even blows at all..look under house and the crossover is not a straight shot it looks 10ft too long and is on the ground…how do i fix it i think its losing its power by the extra length…also how do u know if u have mold in ducts besides cutting them…any answers would be useful???? You should be able to cut off the extra length and re-attach it. I think some plumbers tape (metal strip) every couple of feet would hold it up off the ground. Take the cover off of the floor ducts, hold a mirror down in the bottom of the duct and shine a bright light down the duct.