Intertherm gas furnace won't start
Posted: Tue Oct 28, 2008 11:19 am
model MMHB-070ABHR-06 - HSI LED continuously blinks twice - have replaced HSI and inducer motor 3-07, still get LED error.
This has been going on for a few years now, intermittently until this year, when I can hardly get the inducer motor to fire up at all.
Have tried cycling power both at the breaker box and thermostat - inducer motor will start maybe once every 20 tries, if even then.
Had an HVAC/electrician type look at it last March, he couldn't figure out why the unit failed to fire up. Voltages at transformer are correct. Just by chance, it began to work correctly at that time, but no longer does.
Tried recently replacing thermostat, same result.
Relay? Limit switch(es)?
Urgent - I live high up in the Rockies, where summer is definitely over. Need to be able to heat my home above 53 degrees.
Any advice would be greatly appreciated!!
Jim
This has been going on for a few years now, intermittently until this year, when I can hardly get the inducer motor to fire up at all.
Have tried cycling power both at the breaker box and thermostat - inducer motor will start maybe once every 20 tries, if even then.
Had an HVAC/electrician type look at it last March, he couldn't figure out why the unit failed to fire up. Voltages at transformer are correct. Just by chance, it began to work correctly at that time, but no longer does.
Tried recently replacing thermostat, same result.
Relay? Limit switch(es)?
Urgent - I live high up in the Rockies, where summer is definitely over. Need to be able to heat my home above 53 degrees.
Any advice would be greatly appreciated!!
Jim