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I just bought a '79 motorhome with a coleman model 4312 furnace. the pilot won't light. previous owner said it took forever for gas to reach the pilot for lighting. how do i chevk for blockage in pilot tube, or plugged pilot oriface? hoping it's not the gas valve that's bad. Thanks, Tom

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Hello Tom. Begin by using a small brush and a vacuum cleaner with a hose to thoroughly dust and clean the entire mechanical area in that furnace. If it still won't light, replace the thermocouple, an inexpensive component found in most hardware stores. Joe

4 thumbs up please. Thank you.

Posted on Oct 16, 2010

Testimonial: "Thanks..I will try it and see what happens!"

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