Question about Heating & Cooling
Installed a Honeywell RTH6300B thermostat app 4 months ago. Have a Lennox G20 series Gas furnace. All was working well till last week, smelt funny smell (smelt electrical) and since then the auto fan setting on thermostat will not start fan. Furnace starts but stops without the fan running. Switch to manual fan and evrything works well.
After studying the Lennox manual, could it possibly be the BCC (blower control board that has burnt out) Just a stab in the dark. Appreciate any help I can get
When you call for fan in auto ensure your getting 24 volts at pin on control board, if it is not energizing then there is a problem with the relay.. Before you change out the expensive control board, try the therm..
Posted on Dec 09, 2008
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Posted on Jan 02, 2017
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