1998 plymouth voyager heater problem - no heat

I bought this van about a month ago and now the heater just broke on me. Its a 3.0 litre, 3spd, A/C, airbags, no other options.

Last time I was in the van the heater worked fine. Got in it today and turned on the heater and after a few minutes I could tell something was wrong. Now it just blows cold air. The fan works normall, all the speeds are there. Usually the heater is cranking out heat after only a few minutes of driving.

I'm not as familiar with the van as I should be. The heater mode dial has always worked kind of funny, very smooth, it doesn't click on the different modes which I think is kind of peculiar but I don't know. None of the modes appear to work now either. I try each mode, pause between modes to give it time to switch, but there is no change in where the air is directed, ie windshield, feet etc. All the modes worked the last time I was in the van.

I haven't checked the fuses yet as I don't know which one controls the heater. I checked the manual but it still wasn't obvious. There's no trouble shooting guide with the manual either.

Any help would be greatly appreciated.

Reply to
Frank M
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jdoe

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Frank M

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jdoe

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Frank M

I brought it to someone else and it turns out it was just a mechanical problem in the climate control dial. The switch was malfunctioning. Took it apart and found that a small ball bearing was out of place. Put the bearing back in place and we got heat right away. The dial is working like it should now in that it clicks in place at every setting instead of turning smoothly around with no click at each setting.

Reply to
Frank M

Before you spend your hard earned money, check a few things first:

1) With the car warmed up (15 minutes of city driving), check the heater hoses at the firewall. See if both or one of the hoses is warm. If only one is awarm and the other cold, you have a blocked heater core. You can try to fix it by power backflushing. I had a saimilar problem on a Dodge and 5 minutes of power flushing after pouring some household bathroom lime and rust cleaner for few hours, solved the problem.

2) If both the hoses are cold, coolant is not being pumped to the upper area of the head. You will need to purge the cooling system of all air. One quick way to do it is to open the radiator cap, place the car with the front end higher than the rear (like a ramp etc.) start and warm up, until upper radiator hose becomes warm. It should purge most of the air. Then fill to capacity and leave the cap off for 10 minutes to let more air bubbles out.

Reply to
Rajsircar

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