Hi I'm new to this site. I have a hummer h3 2007 the a/c button to turn it on the snowflake. Will not turn on the AC clutch to work the air. Now I have checked and added proper coolant amount. I have replaced the high pressure sensor and the ambient temperature sensor. If I jump out the circuit in the fuse box number 76 the AC works great dealership told me it was the high pressure sensor and that like I said has now been replaced with new. Also I have done the reset test at instrument panel holding the snowflake and defrost button in thru the cycle. Still nothing. Code comes up as p1545 which is AC circuit
Does anyone know what I am missing here and how to fix this please I am desperate !!!!!!!!!

 

MOVED. Crazy how questions about H3s go in the.......



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H3 section.

 

Hi I'm new to this site. I have a hummer h3 2007 the a/c button to turn it on the snowflake. Will not turn on the AC clutch to work the air. Now I have checked and added proper coolant amount. I have replaced the high pressure sensor and the ambient temperature sensor. If I jump out the circuit in the fuse box number 76 the AC works great dealership told me it was the high pressure sensor and that like I said has now been replaced with new. Also I have done the reset test at instrument panel holding the snowflake and defrost button in thru the cycle. Still nothing. Code comes up as p1545 which is AC circuit
Does anyone know what I am missing here and how to fix this please I am desperate !!!!!!!!!
H

 

does it work on full cold but 1 notch up goes to hot, if it does then the control unit is bad, it may be defaulting to heat

 

swap relay 76 with another like it

ground pin 38 d-gn/wh wire

pcm?

check volts on sensor? pin 26

 

No it won't blow cold at all no matter what setting. The a/c button when pushed blinks 3 times and won't turn on. I jumped the relay and even tried swapping relays still nothing. There was a recall on blower resistor and wire harness so I had it done at dealership a week or two later the a/c would work for few mins then turn off. It did blow some odorless smoke out when this started.

 

I did try swapping relay 76 and got nothing. The other things though I'm not sure how to do. To give more info. There was a recall on blower resistor and wire harness under glove compartment so I got dealership to do that. Shouldn't of thinking back but. 2 weeks later about in morning there was some white odorless smoke came out vent running a/c then it turned off and would each day work for 5 minutes then cut off now it won't even turn on at all

 

Your 2 threads have been merged into ONE. ONE thread at a time please.