Question about 1994 Chrysler Concorde

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Heater speed control

My heater motor runs but will not change speeds. it stays on low.

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Hi ralsal

On the right/passenger side, under the dashboard you will find the blower motor and a resistor which looks like a bunch of metal coils. This resistor is probably burnt out and needs to be replaced as when it burns out it will only blow at the default setting, You can order a new one through your dodge dealer for around $20.

let me know if you need anything else

bestdarngood

Posted on Jan 25, 2009

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You need to test and eventually replace the heater blower resistor.

See: heater blower motor does not work

Posted on Jan 26, 2009

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Hi ralsal,
If you mean that the blower motor only runs  and not the 4 lower speeds, then that means the blower motor resistor block has failed. It is located above the glove box so you need to remove that to access it. There are screws that go around the door box opening, just remove all of those and the glove box should drop out. Then follow the wires from the blower motor that run up and to the right to the firewall above the glove box where you will find a plug into the resistor block. Remove the plug and you will see two screws that hold it in place. Remove the screws and the old block will pull out. Then put in the new block and reverse the steps.
On the air distribution problem, that is controlled by a vacuum operated distribution system that moves internal doors. The vacuum supply is a fine tube that splits off in the engine compartment at the big vacuum hose that supplies the power brake canister. That fine hose goes thru the fire wall to the heater/ac box in the cabin. Check the hose to see that it isn't cracked all the way to the firewall and-or unplugged from the branch point at the power brake canister. If that looks alright, then check under the dash where the hose comes inside and attaches to the distribution switch system.
Let me know what you find and if you need more info.
Taran

Posted on Jan 25, 2009

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