Question about 1999 Plymouth Grand Voyager

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1999 plymouth grand voyager heater does not blow hot

I have a 1999 plymouth grand voyager and the heater is not working. Thermostat is working... I have flushed the system... I have done the programing thing by pushing the rear wiper and rear wash buttons at the same time. The van starts up fine motor warms up to temperature know this because motor is hot and gauge reads normal. I used to be able to slide the temperature control lever to cold and then to warm and i would get warm (not hot like it used to blow) air out the vents for about 5 minutes, now the warm air lasts only seconds. I have been resorting to pushing the recirculate button on the dash just to get the interior of the van warm and that takes 15 minutes after the motor is warmed up

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  • Plymouth Master
  • 1,757 Answers

One of two probable problems:
1. The Heater / Air Condition Control is going bad or is bad.
a. Disconnect the negative side of the battery.
b. Remove the Heater / AC face plate off the front. To do this: Remove the two (2) screws on the top lip of the plate.
c. Disconnect the electrical connectors from the rear of the Control Module.
OR
2. The Heater Core is defective and needs to be replaced.
Sorry, but it has to be noted that the dealer or repair shop ($$) can diagnose the system at the Heater / AC Control Module. Also, after you replace this Module: a diagnostic and re-calibration tests are needed to be performed.
Let me know if this helped or if you have additional questions or information. Feel free to contact me at FixYa.com!

Posted on Jan 15, 2010

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Posted on Jan 02, 2017

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1 Answer

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Since you seem fairly sure the thermostat is working, does this mean it has been replaced recently?
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