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A/C control module defective

Compresser clutchdeactevate when cabine is hot

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1999 Chevrolet Cavalier A/C system.


Yes the blend door is what controls the air temperature at the register outlets. An example would be the temperature control is set to heat, but you only get cold air or slightly warm, then the blend door is not functioning correctly either due to the door actuator being defective or the blend door has become warped and is jammed, in most cases both are the problem. If you do have automatic climate control there can be a problem with the control module as well, but that is the rarer of the problems I have seen. This assumes the heater core is getting hot and it is not plugged.

Feb 21, 2017 | Chevrolet Cars & Trucks

1 Answer

Can anyone give me info for the Krystal Enterprises Digital Control Modules installed in a 2005 Lincoln T/C. Why sometimes they work and sometimes not. Are they dangerous. fire ?


Whole control doesn't work ?
No power for rear cabin at all ?
it could be bad connection.
I have friend freaked out "I have no power for whole rear cabin!! It was working !! somebody help! " at Emmy award Limo parking few years ago.
I looked at her limo, she did turn main switch off on overhead control module unknowingly. maybe she touched something else but accidentally flip rear main power off.
Is not the case ?

also, if your 2nd alternator burned out, you have no power for rear cabin.
But if it's the case, it remain no power for rear cabin (and outside coach light) until you replace 2nd alternator. It won't be "sometimes work sometimes don't".

I had friend who had bad connection (lose connection) at power switch (switching main battery and 2nd battery, it's engine compartment on top of passenger side front tire well)

Apr 30, 2015 | 2005 Lincoln Town Car

1 Answer

WHERE IS PCM LOCATED


do u mean the powertrain control module? if so it is located on the l/h side under the cabin filter housing. remove wiper arms, windscreen plastic scuttle panel, metal brace bar, caution. the 4 outer bolts can break off easily. and cabin filter housing , the module is held with 2 nuts remove connectors and nuts the module then comes out from inside the car remove footwell liner for access

Feb 14, 2014 | 2002 Jaguar S-Type

1 Answer

Seat ibiza 2003 1.9tdi heater not blowing hot air


Check for low coolant or rusty coolant as well as a defective engine coolant thermostat being stuck open and the engine not reaching proper operating temp. You can also have a problem with the door that controls hot and cold air to the cabin, it is called the air temperature control blend door.

Nov 30, 2012 | 2000 Seat Ibiza

1 Answer

Audi a6 quattro 1999 cooling system light is on ,how to fix or what fo i do?


Hi Manuel, That warning light indicates the coolant level is low. To attend the problem make sure the engine is cold. Open the filer cap and the bleeding nipple. Open the cabin heater control to fully hot and fill until all air bubbles have been evacuated from the cooling system (top up with the required mixture of water and coolant/anti freeze, about 40 percent coolant sixty water) When all bubbles have been evacuated, close the bleed nipple and replace the filler cap. Set the cabin temperature as required. If coolant is at correct level and system has been bled it is possible the sender unit may have become defective. Regards John

Nov 17, 2012 | Cars & Trucks

1 Answer

No heat


Hi James, If we're talking about the radiator for cooling the engine, check the thermostat and water pump. If we're talking about the cabin climate control, check the valve operation of the cabin temperature control. Regards John

Nov 15, 2012 | 1997 Ford Taurus

1 Answer

Car only blows heat on passenger side, Drivers side still cold even after replacing the actuator. What else could it be?


If the blower motor is running, that means the 30A HVAC BLOWER fuse is OK. The HVAC control module obtains power through the 10A DIC/RKE fuse in the right instrument panel junction block and the 10A A/C CRUISE fuse in the left instrument panel junction block. Output from the HVAC control module controls the mode actuator and the recirculation actuator. You replaced one of the two. The other one may be defective or the replacement one may be defective. Also, the HVAC control module may be defective and not producing door control output

Sep 30, 2012 | 2005 Chevrolet Impala

1 Answer

My 1986 cadillac deville cranks over but wont start what could it be?


It should be either no Spark or no Fuel.
Possible causes: Out of gas, no oil pressure, faulty oil pressure switch, Bad fuel-pump, fuel-pump relay, needs tune-up, defective ignition control module, wrong air/fuel ratio, defective IAC valve or EGR valve.
Other causes: Wrong timing, bad compression, or clogged CAT.

May 14, 2010 | 2001 Cadillac DeVille

1 Answer

Gmc yukon XL cabin lights do not working with the doors open.


This is related to the body control module, take it to the dealer and have it function tested.

Oct 17, 2008 | 2002 GMC Yukon XL

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