A/C only cold at idle 2007 tahoe

[ddadda]

Compressor turns off when rpms reach 1,000? please help

 

[rockenthebowtie]

Have you recently done anything to the ac system like add freon ? Sounds like high pressure could be a restriction or if you added freon may be to much

 

[ddadda]

Thanks. Did not add any feron or any work. compressor shuts down as soon as pressure gets about 160 on high side

 

[rockenthebowtie]

Hmm 160 isnt bad thats stilk in normal range.. possibly a pressure cycling switch.. relay.. or compressor

 

[ddadda]

could I jump this switch to diagnose?

 

[rockenthebowtie]

Yes it can be

 

[ddadda]

Where is this switch located? jump in closed or open?

 

[rockenthebowtie]

Its on the receiver dryer that is on the passenger side of engine compartment at the fire wall its a aluminum cylinder with ac lines going to it you should see a 2 wire electrical connector plugged into the switch disconnect it you can use a paper clip to jump it only use a small clip if possible don't want to damage the connector terminal

 

[ddadda]

Thanks. I jumped it, works now. Is that the high or low pressure switch on the receiver? Im goning to put the guages on it tonite. About what pressures am I looking for at idle and 2000 rpm? Thanks alot

 

[rockenthebowtie]

Sorry for the late reply had a crazy day... its the low pressure cycling switch.. low side should be between 30-45 high side 140-190 if its low on freon that will also cause the cycling switch to open also