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Current version by: iRobot ,

Title:

Replaced AC compressor, worked briefly, now non-functional

Text:

The AC in my 2005 Mazda 3 stopped working 6 months ago. Finally got around to working on it: replaced the high pressure hose, then realized the compressor had seized. Just finished putting the new compressor in.

I cleaned the system with solvent and put it under -30psi vacuum for ~an hour. Then charged it up, and it worked great! For about ten minutes. Then the AC started fluctuating in temperature from room temp to cold. Then I got a burning smell and it stopped cooling.

The AC clutch is not engaging now. The low side of the ac was at 50psi when I charged it, and it's at ~150psi now (but the car is hot).

Any ideas? I'm thinking it might be a stuck expansion valve. There was a bit of metal in the oil from the old compressor.

Update: My friend posted a request over here and some mechanics have replied with a few ideas. I'm going to order a new condenser, dryer, and expansion valve next.

Device:

2004-2009 Mazda 3

Status:

openclosed
openclosed

Edit by: Kyle Wiens ,

Title:

Replaced AC compressor, worked briefly, now non-functional

Text:

The AC in my 2005 Mazda 3 stopped working 6 months ago. Finally got around to working on it: replaced the high pressure hose, then realized the compressor had seized. Just finished putting the new compressor in.
 
I cleaned the system with solvent and put it under -30psi vacuum for ~an hour. Then charged it up, and it worked great! For about ten minutes. Then the AC started fluctuating in temperature from room temp to cold. Then I got a burning smell and it stopped cooling.
 
The AC clutch is not engaging now. The low side of the ac was at 50psi when I charged it, and it's at ~150psi now (but the car is hot).
 
Any ideas? I'm thinking it might be a stuck expansion valve. There was a bit of metal in the oil from the old compressor.
 
Update: My friend posted a request over here and some mechanics have replied with a few ideas. I'm going to order a new condenser, dryer, and expansion valve next.

Device:

2004-2009 Mazda 3

Status:

open

Edit by: Kyle Wiens ,

Title:

Replaced AC compressor, worked briefly, now non-functional

Text:

The AC in my 2005 Mazda 3 stopped working 6 months ago. Finally got around to working on it: replaced the high pressure hose, then realized the compressor had seized. Just finished putting the new compressor in.
 
I cleaned the system with solvent and put it under -30psi vacuum for ~an hour. Then charged it up, and it worked great! For about ten minutes. Then the AC started fluctuating in temperature from room temp to cold. Then I got a burning smell and it stopped cooling.
 
The AC clutch is not engaging now. The low side of the ac was at 50psi when I charged it, and it's at ~150psi now (but the car is hot).
 
Any ideas? I'm thinking it might be a stuck expansion valve. There was a bit of metal in the oil from the old compressor.
Any ideas? I'm thinking it might be a stuck expansion valve. There was a bit of metal in the oil from the old compressor.

Device:

2004-2009 Mazda 3

Status:

open

Edit by: Kyle Wiens ,

Title:

Replaced AC compressor, worked briefly, now non-functional

Text:

The AC in my 2005 Mazda 3 stopped working 6 months ago. Finally got around to working on it: replaced the high pressure hose, then realized the compressor had seized. Just finished putting the new compressor in.
 
I cleaned the system with solvent and put it under -30psi vacuum for ~an hour. Then charged it up, and it worked great! For about ten minutes. Then the AC started fluctuating in temperature from room temp to cold. Then I got a burning smell and it stopped cooling.
 
The AC clutch is not engaging now. The low side of the ac iswas at 50psi when I charged it, and it's at ~150psi now (but the car is hot).
The AC clutch is not engaging now. The low side of the ac iswas at 50psi when I charged it, and it's at ~150psi now (but the car is hot).
 
Any ideas? I'm thinking it might be a stuck expansion valve.

Device:

2004-2009 Mazda 3

Status:

open

Original post by: Kyle Wiens ,

Title:

Replaced AC compressor, worked briefly, now non-functional

Text:

The AC in my 2005 Mazda 3 stopped working 6 months ago. Finally got around to working on it: replaced the high pressure hose, then realized the compressor had seized. Just finished putting the new compressor in.

I cleaned the system with solvent and put it under -30psi vacuum for ~an hour. Then charged it up, and it worked great! For about ten minutes. Then the AC started fluctuating in temperature from room temp to cold. Then I got a burning smell and it stopped cooling.

The AC clutch is not engaging now. The low side of the ac is at ~150psi (but the car is hot).

Any ideas? I'm thinking it might be a stuck expansion valve.

Device:

2004-2009 Mazda 3

Status:

open