Questions about Air conditioning systems - other Heating and ventilation questions should use 'hvac'

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31
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4answers
81k views

Why does my A/C blow foul smelling air when it first turns on?

Most of the time when I first turn on the A/C in our 2008 Toyota Sienna, the air that blows out has a very distinct chemical - nasty smell. After a while it seems to go away. I'm not sure if I just ...
12
votes
2answers
9k views

Is starting your car with the A/C on bad?

I was always yelled at by my father when I was first starting to drive when I left the A/C on when I turned off the car, and then later turned it back on, with the reasoning that I was ruining / ...
10
votes
2answers
1k views

Why is car A/C typically less reliable than fridges/freezers?

I just had the A/C in my car die on me again; air coming through the vents with the A/C is just as warm with it turned on as off. However, my fridge/freezer is something I've had for over 5 years and ...
8
votes
2answers
2k views

Why might I experience a power falloff after starting my car with the AC On?

I have a 2000 Chrysler Neon which generally runs well. I have noticed that if I start the vehicle, turn the AC on and reverse out of the driveway, the engine seems to struggle/sounds like it is going ...
7
votes
2answers
491 views

What problems can come from AC not running for years?

I have an 81 Chevy C10 that I inherited from my dad. This truck has mostly sat for the last seven years, with me running it enough to keep it in condition. I've been using this truck mainly for the ...
7
votes
1answer
116 views

Shutting off fans at highway speeds

On my vehicle (92 Civic) and most others I've seen, the condenser fan comes on whenever the A/C clutch is engaged. This seems like a waste of electricity (and thus fuel) when cruising at 60-75 mph, ...
7
votes
3answers
2k views

How to fix leaking air conditioning schrader valve

I have a 98 jeep cheerokee sport. The air conditioning coolant leaks. After doing some diagnostics, I detected audibly a hissing sound coming from the low input port, leading me to believe the ...
6
votes
1answer
939 views

Heater smells like sulfur

I drive a 2006 Toyota Sienna. When driving with the heater on I often smell sulfur. This is more common when I am driving up a hill, but if I turn the heater off, the smell goes away. What causes this ...
6
votes
1answer
133 views

Air Conditioning Cools Intermittently

I have a 2001 Honda Civic. The A/C works pretty well - it comes on fast and blows cold. However, after 5 - 10 minutes it stops cooling and starts blowing warm air. If I turn the A/C off, after another ...
5
votes
3answers
6k views

How to recharge AC using booster from auto parts store?

The AC on my 2002 Chevy Cavalier stopped blowing cold in the fall and I had planned on getting it checked out and recharged once the AC check specials started. I saw this for $30 and it seems too ...
5
votes
1answer
3k views

Huge puddle of water under car

I parked my Dodge Viper after driving for about two hours. Half an hour later I noticed a huge puddle under the engine, on the passenger side. I am pretty sure it was water since it was thin, ...
5
votes
3answers
2k views

What is involved to recharge the Air Conditioning System?

What is involved to recharge the Air Conditioning System? I believe you need a machine to do it, so I am guessing you can't do it yourself.
5
votes
2answers
2k views

Easiest way to disable the A/C compressor

My A/C system has a leak in it and my compressor is making an awful noise: probably needs replacing. Winter is coming though, and I really don't want to spend any time or money on tracking down leaks ...
5
votes
1answer
1k views

AC: Fixing or Recharging?

I have Toyota Camry 2000. The problem is AC does not blow any cold air. So, I bought R134a and recharging it myself. It costs me about $12. However, it lasts for about a month. I checked with couple ...
5
votes
1answer
203 views

What should I use to lubricate the flaps that controls the temperature and which vents the air comes out of?

The control shafts that move the flaps which control the the hot/cold air and which vents the air come out have broken. The car is a 1999 93 Saab so I'm assuming that the hinges (the flap has a peg ...
5
votes
1answer
185 views

Do I have to get another Volvo?

I live in Florida and have mold allergies. Multiple times my 2008 Sienna van has a bad AC smell develop which makes me cough my head off. The dealer has cleaned the evaporator and ducts and the ...
4
votes
5answers
36k views

How do you detect and deal with a freon leak?

My heat works great, but my AC is nonexistent. Just blows out normal air, which in this weather is quite hot and unpleasant. I had the freon refilled two years ago, but I haven't used the car in over ...
4
votes
2answers
1k views

Heat only works when engine is revving and at full power

On a 2004 Chrysler Sebring, the air only works when turned up to maximum power. At any of the 3 levels below that, no air comes out. Additionally, when the heat is on, it only blows hot air while the ...
4
votes
2answers
928 views

1998 Dodge Ram AC clutch won't engage

When I call for AC on the dash the clutch on the compressor doesn't engage. I disconnected the clip that connects the wire to the clutch and checked for voltage and there was none. People say that ...
4
votes
2answers
5k views

Honda Civic easily overheats with air conditioning on high?

I have a 2005 Honda Civic DX. I drove my car for about 10 minutes, with the air conditioning on the highest/coolest level. I then parked my car in direct sunlight for another 10 minutes, and kept the ...
4
votes
2answers
2k views

What's wrong with my intermittent air conditioner?

When the weather first starting getting warm last month, I turned on my A/C and it didn't work. The air coming out of the vents was warm and humid. A few days later it started working just fine and ...
4
votes
3answers
7k views

Engine Bogs down with A/C or Defroster On

This started to happen relatively recent. It's 2003 Chevy Trailblazer. What is happening when the engine is idling and I turn the A/C on or the defroster (which also uses the A/C I believe), the ...
4
votes
2answers
1k views

My vents randomly switch between face / windshield… how do I fix this?

I have a 1998 Ford Windstar (more details on demand if necessary.) I rarely use any vent setting besides "face", and I try to avoid using AC because my gas mileage is already lousy. About two months ...
4
votes
2answers
9k views

How do I convert a R12 to R134A for my AC system?

I have an older vehicle that has AC, but it needs a recharge. It uses the older R12 refrigerant and it is very expensive and can be difficult to locate as it is not made in the US anymore. How do I ...
4
votes
1answer
103 views

1998 GMC Suburban Air Conditioner

I am a part time auto mechanic, and for the life of me cannot figure out this problem. No matter how many times I fix it, two weeks later it comes back. I cannot fix the air conditioner. I have ...
4
votes
1answer
3k views

Stuff coming out from my AC

I recently left my car (Honda Accord) in the parking lot of my apartment complex for a little over a month while I was out of town. It was working fine when I left. Now that I've come back, I've ...
4
votes
3answers
749 views

Engine idles badly and loudly when I switch on the A/C

The engine of my 1984 Toyota Carina AA60 works great when idling without the air conditioner running, but immediately after switching it on, it idles very badly, and a big noise starts up. If I move ...
4
votes
1answer
342 views

Drying out wet carpet

My windows keep fogging up, even when it wasn't very cold outside. It seems to form in minutes and unlike regular fog, the droplets are massive! I have to run the AC on high for several minutes before ...
4
votes
3answers
410 views

How can I remove Factory Air Conditioning from a 1965 Mopar Big Block

I have a 1965 Mopar 383 Big Block with factory air conditioning. I would like to remove the air conditioning from the engine, including the A/C pump. Unfortunately, the belts for the accessories are ...
4
votes
1answer
376 views

2001 Saab 9-5 Air Conditioner Fan (upper vents) not working

2001 Saab 9-5 Wagon 9-5 Air Conditioner (upper vents) Fan stopped working. I've examined the DICE fuses, but they all seem to be good. What should I be checking next?
4
votes
1answer
708 views

A/C electrical problem on 92 Civic

I've had intermittent A/C failure on my 92 Civic DX going on for a couple years now. It's clearly an electrical problem. Normally it's solvable by putting some pressure on the control panel, but ...
4
votes
1answer
169 views

Why would turning on the A/C affect my alternator output voltage?

So yet another chapter unfolds in the A/C gremlin saga of my LS1 Chevy. Backdrop A/C compressor is relatively new (2 years old) One of the belts is squeaking (not sure which one) Recently performed ...
4
votes
1answer
850 views

A/C Does Not Continuously Blow Cold

I have an '06 Chevrolet Silverado with a 5.3L L33 engine and 146k miles. I have been having issues with the A/C not continuously blowing cold air. It seems to cycle between cold and luke-warm. I have ...
3
votes
3answers
24k views

Why am I smelling exhaust inside the cabin of my car?

When I drive my car the first few miles, I smell exhaust inside the car with the windows rolled up. It happens when I have either the AC or the heat/air on... What's going on?
3
votes
3answers
7k views

What do I risk if I don't fix my leaking evaporator core on my 2004 Jeep GC?

The shop just tested my non-working AC, and recharged the freon - so, for now, it's working. Cost $118 all in. However, they tell me I have a leak in my evaporator core, and that it will take 16 ...
3
votes
2answers
131 views

What is the purpose of AC re-circulator?

I think every car has re-circulator functionality in AC control panel. But I don't really use it, because it fogs up all of the windows. What is the purpose of the re-circulator?
3
votes
2answers
375 views

1995 Mercury Mystique - No more cool air from AC

I've got a '95 Mercury Mystique that I have been trying to fix the A/C or for awhile (as budget allows). I just had an overhaul from the shop... Had a new compressor installed - the old one had ...
3
votes
1answer
849 views

When I set the air flow to Defrost, it turns on the A/C?

On a 2001 Honda Civic. Having the temp dial to HOT. When I turn the air flow dial from FRONT to Defrost (windshield), it turns on the A/C button and the A/C motor kicks in also. It just started doing ...
3
votes
3answers
125 views

ac compressor empty anything to worry?

Recently I just had a small crash that broke a plastic flange from my ac system. I checked around to be sure nothing else is broken and it really look like this is the only broken thing. The ...
3
votes
2answers
81 views

How often should you get your air conditioner checked and serviced?

Every year I bring my car (now almost 3 years old) to the garage for a check up. When I bring it the people from the garage usually ask if I also want the extra air conditioner check and servicing. ...
3
votes
3answers
63 views

AC Recharge- What did I do wrong?

I drive a 2010 VW Golf. The AC has not been working at all lately. Before taking it in to the pros, I bought an AC Recharge Kit and only got to step 1 on the directions. When I hooked it up to the ...
3
votes
1answer
722 views

AC not working in 2005 Chevy Cobalt

I have a 2005 Chevy Cobalt; its heater works fine, but AC doesn't seem to work at all. Fan works, but even at cooling set to max it just blows room temperature air. What could be the reason? Thanks!
3
votes
2answers
2k views

How much isopropyl alchcol to deodorize AC ducts?

i'm looking to remove an odor from my Corolla's fresh air intake. There are products available where you spray the product into the fresh air intake (near the windshield wipers), while the fan is ...
3
votes
2answers
2k views

Location of Blend Door Actuator in 2003 Chevy Malibu

I am fairly certain that my Blend Door actuator is faulty. I get all hot air in my car, which is great for the winter, not so much for the summer. I want to replace it, and followed directions on ...
3
votes
1answer
222 views

Am I getting ripped off by my mechanic?

We've been taking our cars to a local mechanic for years. Always been treated right, they've charged us fairly and everything was great. This year, though, we've had to take one of our cars in three ...
3
votes
1answer
9k views

Patch A/C condenser?

I have a small leak at the top of my air conditioning condenser. Last summer, I tried patching it with JB Weld. They do advertise as working with all metals, but I suspect it failed to hold because ...
3
votes
1answer
102 views

A/C clutch turns on and off frequently

I have 2011 Mazda CX7. When I first turn the car on I can see the A/C clutch being engaged, but after the car runs for bit, then clutch disengages. After a while it starts to engage for few seconds ...
3
votes
2answers
177 views

Air conditioning not on, but still giving out cold air when car in motion, and makes hissing sounds

Have a 2000 Honda Accord 4 cylinder. Problem started last week. Turned a/c to cold, cold air not as cold as before, plus a loud hissing sound that seems to be coming from the passenger side, under the ...
3
votes
1answer
1k views

My AC works well at night only

I'm unhappy with the performance of my '04 Pontiac GTO's AC. Here are the symptoms: Cooling goes down to zero when the car is stationary, starts to cool after the car has been moving for some time ...
3
votes
2answers
40 views

What AC component would likely be the problem with my consistent power loss while driving?

I have looked through the questions to find an answer to my question and none of the questions seem to similar enough to this. I have recently purchased a 2002 Subaru Impreza Rs and the car is doing ...