Question about Cars & Trucks
No power going to ac compressor. when you jump the compressor it blows cold air out
I would check the a/c clutch relay. Other possibilities include pressure switch, fuse, or wiring.
Posted on Apr 24, 2013
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Posted on Jan 02, 2017
SOURCE: 94 Saab 90 SE AC blows hot air
Usually the clutch is frozen means you need Freon R-12, please go to the small glass window on the condenser to find out there is some white bubbling inside, if you have white bubbling means your AC lack Freon, but if you lost all Freon, the window is clear, so you have to check, I hope from there, you can tell the Freon level.
Step by step
Posted on Jul 06, 2008
If you look on the low pressure side of the AC system you will see a plug that is incorporated in to the line. It will have two wires leading to it. Remove the plastic clip that attaches the two wires to the sensor and use a short piece of wire to connect the two terminals in side the plug by putting the ends into the cap. This will bypass the low pressure sensor and allow the AC clutch to engage and begin to cycle again. Remember this low pressure switch is there for a reason. If you don't add more r-134 to the system and allow the AC compressor to cycle you will destroy the compressor. You need to charge the system when you bypass the low pressure switch and get the system up to full charge status and reconnect the switch.
Posted on May 24, 2009
Your system might be low on freon. Get a kit with a hose that has a gauge on it so you can see if you are in the "Good" range. The cycling switch won't close unless there is enough freon in the system. You can temorarily jumper the connector for the cycling switch to see if the compressor will come on. If it does, you are low on freon for sure. Do not let the compressor run for more than 15 - 30 seconds with it jumpered.
report back results.
Posted on May 21, 2009
SOURCE: Dodge Ram AC not blowing cold
By pass both pressure switches one at a time with small wire or a paper clip. If comperssor kicks on replace the swich that you bypassed.
if not it could be the fan clutch ot the compressor. Compressor runs about $400.00
Posted on Jun 23, 2009
You would have to measure the pressure to determine if it's pressurized correctly. The compressor won't run if it's low.
What happens when you push the a/c button? Can you hear/feel the compressor kick in? It seems like in most cases it's the compressor itself or the compressor clutch that goes. It's way too common in vw's...
Posted on Jul 12, 2009
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