Furnace Troubleshooting (the first step)

November 24, 2006 by · 439 Comments
Filed under: Service Issues 

I recently had a furnace come in- complaint was that nothing happened- no fan, no heat.. nothing.

Whenever I have a furnace problem, the first step I take is to go to the thermostat. This one had a simple heat only, mechanical thermostat. I pull the cover off, switch my multimeter leads to read amperage and hook up the leads across the thermostat terminals.

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