Question about 1995 Jeep Grand Cherokee

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When heater control is plugged in no functions work and security light comes on

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Check all fuses. first.

Posted on Nov 22, 2013

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1 Answer

My heater control panel does not light up so I have no control


Hi, Your heater may still function its the light maybe burned out.
You will have to remove some plastic panels to get at it.
Good luck.

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Are the heater controls cable operated? You would need to look under the dash and see if the cables are still attached and still functioning when heater controls are moved. The cables will attach to doors to direct heat out.

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nothing.....??? what year, GRAND? all cars are wired different !!!
what do you want to work right. ????
say all that works and not.
heater fan?
heat? dead.
A/C dead>?
or does nothing mean the interior park/dim lights are dead, ALL?
please state one function that is dead.
i do not understand the security thing. where is it in the dash
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I have a 1991 buick rivera it has no heat from the heater. I have had the cooling system flushed. I changed the temp control module.But nothing Changed.wife getting cold in tennessee winter need help.does...


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A/c not working .hasplenty of freon. light on control panel does not light up. compressor not turning"on". power at relays.


have you checked all the fuses under hood in black box? relays may be good but theres no power or that light should come on. if all your fuses are good then may be that the heater control panels bad. i would make sure that the compressors plugged up, check all those fuses, then go towards a bad heater control panel.. hope this helps!!

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1 Answer

2004 Odyssey, heat and A/C do not work unless van in motion


Since warm air eventually comes out when the vehicle is in motion, you may have an air mix door that is stuck in fresh or is somehow blocking warm air from the heater core.

To see if the air mix control motor is bad, you need to retrieve your Diagnostic trouble codes (DTC's) from the heater control panel. To run the diagnostic function, do the following:
1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirc control button to select Recirc (recirc light on.)
4. Press and hold the recirc button to select Fresh (recirc light off) and continue to hold the button down until the recirc light comes on for two seconds and then goes off.
5. If the system is okay, the recirc light stays off.
6. If there is a problem, the recirc light blinks the DTC to indicate the trouble. One blink=a problem in the air mix control motor circuit. Two blinks=problem in the mode control motor circuit
Three blinks=problem in evaporator temp sensor circuit.
7. Turn the ignition switch off to cancel the self diagnosis function. Run the diagnostic again after repairs are complete.

Note: the air mix control motor has a rod which connects to a plastic link. The link controls the mix doors and also connects to the heater control water valve via a cable. The air mix motor may check okay, but if the link is broken then you will still have problems. the motor is on the bottom of the heater unit in the front passenger's foot well.

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Heater/AC controller failure


If you dont have your 5v reference then no amount of modules is going to do you any good. Get a diagram trace your wire back and i'm betting you will find it fried to a crisp somewhere along the line, but make sure you check your fuses first. start simple and work into it. GOOD LUCK!!!

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5 volts is not enough to run the blower sound like your blower resister is shorted out and back feeding the system did you check it?

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