AC amplifier test? (4 Viewers)

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Joined
Apr 9, 2009
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Location
Mason, Texas
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www.irontonforge.com
Is there a way to test the a/c amplifier? I replaced mine with a used unit... I have power going in but not out. I realize the used unit may be bad as well. I'd like to test it before buying a new amplifier... they're a bit pricey.

Thanks!
 
what's an a/c amplifier?
 
what's an a/c amplifier?

ac.jpg
 
Bump... Summer is coming and I'd like the get my A/c repaired!

The a/c shop thinks the amplifier is the culprit. I replaced all a/c parts last year. Everything worked great... then the compressor suddenly would not engage. I can bypass and the compressor engages fine.

My question is... How do I test the amplifier? Here's pics of the internal circuit board. It looks pristine.

Any help is much appreciated! Thanks!!

thumbnail_IMG_1250 (2).jpg


thumbnail_IMG_1251 (2).jpg
 
Bump... Summer is coming and I'd like the get my A/c repaired!

The a/c shop thinks the amplifier is the culprit. I replaced all a/c parts last year. Everything worked great... then the compressor suddenly would not engage. I can bypass and the compressor engages fine.

My question is... How do I test the amplifier? Here's pics of the internal circuit board. It looks pristine.

Any help is much appreciated! Thanks!!

View attachment 2637484

View attachment 2637485
Did you ever get this answered? I’d love to know if the problem is the amplifier before I go working on the water temperature relay.
 
Did you ever get this answered? I’d love to know if the problem is the amplifier before I go working on the water temperature relay.
I never found a way to test the A/C amplifier. I eventually bought a new unit from Toyota. Turned out it was not the amplifier, but a wire issue behind the dash.

Unless there is corrosion on your amplifier board, I suspect it is good. I have a used amplifier if you need it.

Good luck!
 
I never found a way to test the A/C amplifier. I eventually bought a new unit from Toyota. Turned out it was not the amplifier, but a wire issue behind the dash.

Unless there is corrosion on your amplifier board, I suspect it is good. I have a used amplifier if you need it.

Good luck!
Thank you for this. I too never found a way to test it and eventually found that the issue was with the AC cutoff sensor above the oil filter "downstream" of the amplifier. Once I pulled the connector off the sensor, the AC ground loop closed, and the AC now works. I'm hoping the AC cutoff sensor will work once I clean off years of oil that head leaked on it from before I replaced the head gasket.
 

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