My van heater blower motro did not work for months.suddenly it came on and went off.I cant get it to come back on.I ran direct current to blower and it works.I replaced relay under the hood ,no luck.I have one hot lead at the connection to the relay and thats it.also one time i just kept switching the heater on and off rapidly and one time I got about 20 seconds of operation...now nothing ,,,any ideas.thanks
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Re: 1991 ford econoline heater problem
Ther is a small fuse in the switch itself so i would try to replace this if you get movement when connected to battery directly. if not try to check connections directly behind it to make sure you have voltage with a tester or a wire and a bulb if needs be.
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Make sure that you have 2 heater hoses going into the dash. These are 5/8" hoses coming from the water pump and going into the top of the engine. The 2 hoses go through the firewall into the heater core. If you don't have the 2 hoses going to the heater core, the previous owner may have it routing itself back to the engine. It the hoses are routed back to the engine, there's a chance of the heater core being bad as well and this is why it's by-passed.