Heater not working?

CANADAKAT

MEMBER
1 POST
1998 DODGE CARAVAN

Heater problem
1998 Dodge Caravan 6 cyl Two Wheel Drive Automatic 252k miles

Hi,
I have a '98 Caravan with just over 252k on it and my heater is acting up. The blower works fine - no 'bad' noises and seems to be right speed(s), but I usually (although not always) only get heat when the car is moving. No heat (most of the time) when idling - blows cold air.
Can someone give me a few 'first things to check'? I would appreciate it.
Thanks.

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Monday, November 2nd, 2020 AT 8:38 AM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

I'll replace the thermostat that don't work check the heater control valve and heater core.

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Monday, November 2nd, 2020 AT 8:38 AM (Merged)

JACOBANDNICKOLAS

MECHANIC
108,192 POSTS

Hi:
Also, make sure the coolant level is full. Low coolant can cause the same problem. If it's full, as rasmataz said, you'll most likely need a thermostat is the engine isn't operating at a normal operating temp which is around 200 degrees.

Joe

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Monday, November 2nd, 2020 AT 8:38 AM (Merged)

MORAN816

MEMBER
1 POST
1998 DODGE CARAVAN

I got in my van & drove about 10 miles (city) when I got to my destination I sat in the car for 5 minutes and the heat stopped and starting blowing cold air. Then driving home the van heated up for about 5 minutes then started blowing cold air again. About a month ago I noticed when I drove the car we had heat but when the car was parked but still on there was no heat just blowing cold air. Please help 8)

Thank you

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Monday, November 2nd, 2020 AT 8:38 AM (Merged)

BHUGG

MECHANIC
157 POSTS

Check the raidiator coolant level.
Also the thermostat may need to be changed.

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