Suburban furcance prob lem
My furnace will light and run for about 5 seconds, then quit for maybe 30 seconds and try to light again. It does this 3 times then shuts down. You can turn off thermostat and it will cycle and keep o...
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3 rimes and it locks out. That is SOP. Could be as simple as a bad thermoswitch or could be the sail switch is hung up. It's not sensing the flame so it's shutting down and starting again. 3 times and it's done.
