Why Doesn’t My 2004 Dodge Grand Caravan’s Rear Heating and Air Conditioning Work?

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

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

Climate Control Unit Blower Motor

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Dorman® – 2004 Dodge Grand Caravan – OE Solutions Series Climate Control Unit – Direct Fit, Sold individually

$147.95 Price and rating may change from the time content is published.

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Replacement – 2004 Dodge Grand Caravan – Blower Motor

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GPD® – 2004 Dodge Grand Caravan – HVAC Pressure Switch – Sold individually

$9.49 Price and rating may change from the time content is published.

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