HELP!! Furnace won't work
I'm in Bryce Canyon and during the night my furnace stopped working. The thermostat is working but the blower only comes on and blows cold air for about 30 seconds and then stops. I have checked...
Forum Discussion
IF on shorepower than your converter should be supplying 12V DC power
Fan starts runs when t-stat calls for heat.......but no main flame
When fan comes up to speed (at least 75%) the sail switch closes........12V DC is then sent thru sail switch to/thru limit switch to control board. When purge is complete 12V DC is sent to gas valve to open it at same time DC Voltage is sent to spark electrode which lites off main flame...main flame then produces milivolt signal that goes back thru spark electrode control board to hold gas valve open until temp set point on t-stat is satisfied.
DO you hear any click, click, click........sprak electrode trying to light main flame?????
No clicking..no spark...no main flame
Could be sail switch not closing, could be spark electrode/high voltage wire bad, could be control module....could be electrode not positioned directly in main flame.
Which MODEL of furnace.......may be able to test in place or might have to pull out and bench test.
Fan starts runs when t-stat calls for heat.......but no main flame
When fan comes up to speed (at least 75%) the sail switch closes........12V DC is then sent thru sail switch to/thru limit switch to control board. When purge is complete 12V DC is sent to gas valve to open it at same time DC Voltage is sent to spark electrode which lites off main flame...main flame then produces milivolt signal that goes back thru spark electrode control board to hold gas valve open until temp set point on t-stat is satisfied.
DO you hear any click, click, click........sprak electrode trying to light main flame?????
No clicking..no spark...no main flame
Could be sail switch not closing, could be spark electrode/high voltage wire bad, could be control module....could be electrode not positioned directly in main flame.
Which MODEL of furnace.......may be able to test in place or might have to pull out and bench test.
