1998 Dodge Ram Heater problem

WHITINGS

MEMBER
1998 DODGE RAM
V8
4WD
AUTOMATIC
251,000 MILES

We have put a new thermostat in and it still does not blow out hot air. The hoses connected to the heater core gets hot both going in and out itself gets really hot. It blows out plenty of air it just does not get hot. Any help would be appreciated. Thank you!
Tim Whiting

4 Replies

BLACKOP555

MECHANIC
10,371 POSTS

Your gonna have to check your blend doors down inside of the dash in that case, it is probably sticking due to no vaccum or little or a bad switch, could even just be sticking. Check the vaccuum lines for cracks and cuts first.

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Thursday, December 27th, 2007 AT 9:22 PM

SILKEY21

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2 POSTS

Is there any diagram or schematic that you have of where the blend dooors are, and vacuum lines as well, just tryn to save tearing stuff up lookn for em.
Anything would help. Thanks

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Saturday, December 29th, 2007 AT 1:08 PM

BLACKOP555

MECHANIC
10,371 POSTS

Blend doors are under the dash in the heating ducts.

The vaccum lines I don not have a diagram off, there should be a sticker under the hood for vaccum lines.

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Saturday, December 29th, 2007 AT 1:15 PM

SILKEY21

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Another question blackop555 the dash on this truck, is there any way of getting the top cover off, and how, I removed all screws that I can see, and heard there is a few under but was unsure. Do you know of any way or does it all come off as one piece? Thanks

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Saturday, December 29th, 2007 AT 9:17 PM