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not cooling

blasterx2g on Mon August 13, 2007 8:28 PM User is offlineView users profile

Year: 1972
Make: chevorlet
Model: chevelle
Engine Size: 307
Refrigerant Type: r12
Ambient Temp: 95
Pressure Low: 32
Pressure High: 240
Country of Origin: United States

I just finished restoring my 72 chevelle. Replaced all the ac parts except for the evaporator and had that tested first. Added 3.75 pounds of r12 freon. Low and high side reading were ok. No cold air was blowing out the vents. Low side poa tube was not cooling down either. Alot of condensation form the evaporator area. Why isnt it blowing cold?

Chick on Mon August 13, 2007 8:32 PM User is offlineView users profile

Are there bubbles in the sight glass on the drier? Did you change the driwer to one compatable to R134a, and did you use virgin R12 or an R12 replacement?? The low side should be around 28.5 psi with a POA and r12.. The fact that it's removing water thru the drain is a good sign though..You may just need to 'adjust" the charge a bit..

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Chick
Email: Chick

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blasterx2g on Mon August 13, 2007 8:46 PM User is offlineView users profile

Im using real r12. The site glass is almost totally clear. I could probbaly add a touch more but im not going to waste anymore if the system needs to be evcuated to work on it. I had the POA tested and rebuilt. Could the poa be blocked or the expansion valve be blocked?

blasterx2g on Tue August 14, 2007 9:25 PM User is offlineView users profile

blasterx2g on Tue August 14, 2007 9:26 PM User is offlineView users profile

anyone?? ;-(

blasterx2g on Wed August 22, 2007 7:55 AM User is offlineView users profile

I just took the whole systen apart and flushed it thinking there might be an oil blockage. Cools slightly better but still isnt blowing any better than 75 at best. The pressures are still correct. the evaporator is sweating too. What could be wrong? Its a rebuilt POA and the only part not repalced is the evaporator. Why are the pressures fine but not blowing cold

HECAT on Wed August 22, 2007 9:21 AM User is offline

defective heater core bypass valve, blend door issue?

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blasterx2g on Wed August 22, 2007 4:30 PM User is offlineView users profile

i had clamped off the 2 heater hoses. The blend door seems to be working

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