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Summary
  • The 2004 Dodge Grand Caravan’s heater and A/C might simultaneously stop working because of issues with the rear blower motor, rear HVAC control unit, and rear mode door.
  • You can usually find the dipstick on the driver’s side of the engine compartment; it has a yellow loop on top of its handle.
  • Put your vehicle on level ground and ensure it stays at standard operating temperature while checking the transmission fluid.

Q: I have a 2004 Dodge Grand Caravan. The rear heating and air conditioning are both inoperative. What could be the cause?

Also, I would like to know how to check the transmission fluid level since the vehicle doesn’t have a dipstick.

– Russ from Vineyard, Utah

controlling ac unit
If both the heater and A/C are inoperative, you’re likely dealing with an issue with the rear blower motor, the rear HVAC control unit, or possibly the rear mode door.

A: Hello, Russ. For the most part, your car’s heating and air conditioning (A/C) are two separate systems. The heater relies on hot engine coolant, whereas the A/C uses refrigerant.

But what the heating and A/C both share is the climate control air management system. As such, if both the heater and A/C are inoperative, you’re likely dealing with an issue with the rear blower motor, the rear HVAC control unit, or possibly the rear mode door. You (or your mechanic) will need to do some troubleshooting to know for sure. 

As for checking the transmission fluid, there should be a dipstick on the left-hand side (driver’s side) of the engine compartment. The dipstick handle has a yellow loop at the top. 

You’ll want to check the transmission fluid with the vehicle on level ground and at normal operating temperature. The engine should be running. Step-by-step instructions for checking the fluid can be found in your owner’s manual

Also, the video below demonstrates how to check the transmission fluid on your vehicle:

Products Mentioned in this Guide

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Replacement – 2004 Dodge Grand Caravan – Blower Motor
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About The Author
Written By Automotive Subject Matter Expert at CarParts.com

Mia Bevacqua has over 14 years of experience in the auto industry and holds a bachelor’s degree in Advanced Automotive Systems. Certifications include ASE Master Automobile Technician, Master Medium/Heavy Truck Technician, L1, L2, L3, and L4 Advanced Level Specialist. Mia loves fixer-upper oddballs, like her 1987 Cavalier Z-24 and 1998 Astro Van AWD.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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