A/C blows hot air?

Tiny
PRESSD01
  • MEMBER
  • 2008 TOYOTA CAMRY
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 43,500 MILES
I have a 2008 Toyota Camry, with the A/C turned on it blows hot air. This car was was a salvage repair vehicle so it is not under warranty. The compressor will not turn on when the car is switched to A/C. I can manually apply voltage to the compressor and it will engage. The pressures on the sytem are off when the A/C is not on car off the low side pressure will read about 85 to 90 psi on the gauges this seems to be to high compared to other A/C sytems the high side pressure reads about the same 90 to 100 psi. When I jumper the compressor the low side pressure will drop to about 30psi and the high side will drop about 3 to 4 psi. I am not getting any freon trough the site glass on the gauges. A toyota master tech said that the compressor was the problem. I replaced the compressor and still have the same problem. I then replaced the expansion valve due to other A/C dianostic charts but that did not fix the problem either. The only other component that has been replaced was the condensor as part of the salvage repair. Any suggestions on this would be greatly appreciated.
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Friday, April 30th, 2010 AT 8:23 PM

28 Replies

Tiny
MERLIN2021
  • EXPERT
The pressure with compressor not running is OK, it a normalized pressure. But if the high size is only 3-4 psi, the compressor is no good, or there is a blockage before the high side service port, it should read 150-200 psi.

This guide can help us fix it

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down these guides and report back.
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Friday, May 29th, 2020 AT 3:25 PM
Tiny
PRESSD01
  • MEMBER
The high pressure drops 3 to 4 psi from the 125psi mark. The pressure never reaches the 150 psi on the gauges. The pressure drops when the compressor is jumpered on which the pressure should increase instead of decreasing when jumpered on. The compressor has been replaced with a new pressure switch, compressor and the expansion valve has been replaced also. I would agree there must be a blockage but am having a hard time finding it. I have pulled the lines and blew through them and they appear to be ok with sufficent airflow through them. The condensor was replaced when the car was repaired. Any other suggestions would be greatly appreciated.
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Friday, May 29th, 2020 AT 3:25 PM
Tiny
MERLIN2021
  • EXPERT
So the high side is 125? If yes add more freon, high side 150-200 depending on how hot is is out, and low side 35-45.
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Friday, May 29th, 2020 AT 3:25 PM
Tiny
RBSPEERS
  • MEMBER
  • 2007 TOYOTA CAMRY
  • 2.1L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 88,000 MILES
I have warm air blowing out of the two left vents and cold air blowing out of two right vents. This car does NOT have dual climate control!
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Friday, November 27th, 2020 AT 8:30 AM (Merged)
Tiny
WRENCHER1
  • EXPERT
It is most likely low on refrigerant. It requires a very precise charge so the only way to do it accurately is to have it completely recovered and recharged with the proper weight of refrigerant. If all good you may have a bad air mix servo control motor, see the diagram below for location. You can remove it and work the door manually to see if it solves the issue
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Friday, November 27th, 2020 AT 8:30 AM (Merged)
Tiny
BKLYNLEN
  • MEMBER
  • 2007 TOYOTA CAMRY
On my camry the AC works sometimes, which seems to be weird to me?
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Friday, November 27th, 2020 AT 8:30 AM (Merged)
Tiny
DOCFIXIT
  • EXPERT
It sound like the compressor clutch is going out but to be sure here is a guide help us see whats wrong.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.
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Friday, November 27th, 2020 AT 8:30 AM (Merged)
Tiny
CREDMAN6107
  • MEMBER
  • 2004 TOYOTA CAMRY
  • 143,000 MILES
At the beggining of the summer the ac stopped working, it would come on and off as you were going down the road(meaning it would get cold after driving for a little while SOMETIMES). Well we found out the ac hose had a leak in it. We fixed that and in doing so had to recover all of the freon in the car. (My husband has his license and does this all the time so we were able to do this at home.) After that the a/c was cold again, but it was only it's coldes in the back seat and on the right side of the car. Well we dealt with it this way for a few weeks maybe a month and then (knowing we didnt refill the car with enough freon) we added what we needed to to make it the correct amt that this car calls for. When we did that the clutch stopped spinning. We let some pressure out of the low side and the ac came back on. After that we just left it again and dealt with it like it was. Well then there was another small leak at the fitting on the high side because the o ring broke. When we went to fix it we tested the pressure added a little freon and it blew cold for a while. Well being dumb we added freon bc thats why we thought it was blowing hard or cold on teh left side of the car. THis caused the clutch to stop spinning, we let some pressure out of the high side it came on and now the a/c is hot. We finally realized or found out ot change the air filter and thats when it started blowing hard like it is suppose to, but the air is still not cold. As of right now we can put freon in, the cutch will engage and everythign seems to be working correctly but the air is hot and for some reason the pressure is hihg on the high side and low or none at all on the low side. I"m scared it's the compressor bc we always have that kind of luck, worse case senario kind of luck. Please help me figure this oout and I'll be forever thankful!
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
DOCFIXIT
  • EXPERT
Contamination and/or moisture in system. Evacuate replace receiver dryer vacuum down 2hrs. Then recharge
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
CREDMAN6107
  • MEMBER
Where is the receiver dryer?
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
DOCFIXIT
  • EXPERT
On side of condensor Toyota calls it modulator assembly and cooler dryer inside. Note need to add 1oz oil
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ONYEMADUKAIRO
  • MEMBER
  • 2004 TOYOTA CAMRY
  • 2.4L
  • 4 CYL
  • AUTOMATIC
  • 162,000 MILES
When I come to a stop, it doesn't work. Also when the weather is sunny it doesn't work, it blows hot air. But when the weather is cool (at night or early morning) it works.
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good morning,

Has anyone checked the Freon and the actual pressures?

you may be low on Freon or there may be something in the system not allowing cool air to be produced.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Do you have a set of gauges to check the pressures?

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Roy
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Did you check the pressures as I have suggested?

The compressor is only a part of the whole system and is a very expensive guess. I do not like to guess as it is expensive and most of the time wrong.

Roy
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ONYEMADUKAIRO
  • MEMBER
Thanks, but my AC, when turned on, takes time to circulate. In fact it takes time to get to the back seat.
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Okay, that is why I suggested getting the actual pressures. Can you do that?

You can rent a set of gauges at a parts store and read them.

Roy
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ONYEMADUKAIRO
  • MEMBER
Okay, I will do as requested and get back to you with the results.
Thanks
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Always glad to help.

Roy
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
KMAC12
  • MEMBER
  • 2004 TOYOTA CAMRY
  • V6
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
The AC will sometimes work for a couple mins but then stops blowing cool air. When it starts doing the warm air, it will be stuck like that sometimes for a couple weeks. Occasionally I will try it and it will do cold air again for a few mins but then back to warm air again. I did have the Freon recharged last summer and it was cold again for one or two days but then went back to the same pattern as mentioned before. The AC light does not blink (like I have seen others describe) the AC light stays on. Any thoughts?
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Friday, November 27th, 2020 AT 8:35 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

It sounds like you may be low in Freon again. There may be a leak in the system.

The way to tell is by pressure readings on the high and low side.

Have you had the ac system checked?

Roy
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Friday, November 27th, 2020 AT 8:35 AM (Merged)

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