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I have a Jantitrol GMP 100-3. When it works, an exhaust fan kicks in for a minute, then the flames go on and it starts to heat. Then what started to happen was the exhaust fan would go on for a bit, go off, then go on, go off, then finally turn on, and then the furnace would light. Now it won't turn on at all. There is a significant dust source next to the furnace. Any advice? Thanks.

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"There is a significant dust source next to the furnace." You were headed in the right direction without knowing. Dust can certainly play a big role in creating the problem. When the furnace is operating it's sucking in the surrounding dust and lint. This can clog the electrical contacts, cause false readings to the control panel and other damage. If you feel comfortable doing it, you can clean it yourself. Just remember to turn OFF all power to the furnace, before removing the panels and working inside the furnace. A Shop Vac with a hose, brush attachment and crevice tool will be a big help in cleaning. If you don't feel comfortable making it a DIY project, call a qualified technician to perform the work.

Hope this helped you.

Posted on Mar 16, 2011


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