Question about 1995 Chevrolet K1500

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1995 k`1500 my heater and a/c stopped working blower blows air out bottom all blower speeds work ac no lights clutch not engaging checked fuses

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  • amfmstrawber Sep 06, 2010

    for the time being ignor ac i dont think they accurred at same time how about mode

  • amfmstrawber Sep 06, 2010

    and temp or air inlet actuator

  • amfmstrawber Sep 06, 2010

    yes this i can work with thanx fred

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Sounds like you may have two problems
you need to install pressure gauges on the a/c lines to confirm charge
then "jump" the clutch switch to verify a/c operation
as for the location of air from your dash, then is the result of a defective selection motor

did both of these occur at the same time?

Posted on Sep 06, 2010

  • Sean Reisdorf
    Sean Reisdorf Sep 06, 2010

    alright... so just focusing on just the location of air discharge my thoughts are the same...

    1.) Ignition switch in ON. Disconnect front mode door motor connector.
    Move front blower switch on HVAC to L0. Observe that front blower motor is operating. Connect a DVOM from front mode door motor connector cavity 8 to ground. Move mode control dial while observing voltmeter response.
    If no voltage, erratic change or fixed voltage is observed, go to next step. If smooth voltage change is observed, go to 5 .

    2.) Disconnect connector C3 at HVAC module. Connect an unpowered test light from connector terminal 9 (White wire) and ground. If test light is not lit, go to next step. If test light is lit, repair short to voltage on White wire between HVAC module and front mode door motor

    3.) Connect a self-powered test light between HVAC connector C3, terminal 9 (White wire) and ground. If test light is not lit, go to next step. If test light is lit, repair short to ground on White wire between HVAC module and front mode door motor.

    4.) Connect a self-powered test light between HVAC connector C3, terminal 9 (White wire) and front door motor connector terminal 8 (White wire). If test light is lit, replace HVAC module. If test light is not lit, repair open in White wire between HVAC module and front mode door motor.

    5.) Connect an unpowered test light between front mode door motor terminal 10 and ground. If test light is lit, go to next step. If test light is not lit, repair open in Brown wire between Splice S243 and front mode door motor.

    6.) Connect a self-powered test light between front mode door motor connector terminal 7 (Black wire) and ground. If test light is lit, replace front mode door motor. If test light is not lit, repair open in Black wire between front mode door motor and Splice S244.

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Sorry I mean ac is working on all speeds excep on 4th blower speed, blower blows but ac clutch is not engage

Posted on Jun 17, 2013

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Your ac clutch is not engaging due to a loss of Freon in the system. Your AC system will need to be recharged for the AC to operate, but if the system lost Freon, then there is a leak and will ahve to be traced in order to locate where this Freon leak is coming from. Not a fun job. As for the heat not working, the blend door under the dash is not opening the duct for the heater core assembly to allow hot air to enter the cabin, and this too will require a visual inspection from under the dash and is a big job that may or may not require dash disassembly.

Posted on Sep 06, 2010

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