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DIY Home Repair Forum: HVAC 01-07-2011, 07:24 PM
Replies: 23
Views: 7,925
Posted By Dtodd
Paul It was the stack inducer fan. Installed...

Paul
It was the stack inducer fan.
Installed new on/off power switch tonight.
With both fans running now getting 24.7v @ transformer, 24.2v back from thermostat and 24.0v @ fan limit switch and...
DIY Home Repair Forum: HVAC 01-06-2011, 08:02 PM
Replies: 23
Views: 7,925
Posted By Dtodd
It's a 40VA transformer. With the vent blower...

It's a 40VA transformer.
With the vent blower off I was getting 26.5 volts out, vent blower on
24.6 volts out and 24.1 volts back from thermostat.
I got this after I took the120 power on/off...
DIY Home Repair Forum: HVAC 01-05-2011, 07:57 PM
Replies: 23
Views: 7,925
Posted By Dtodd
Paul, Think you might be on to it. I see my...

Paul,
Think you might be on to it.
I see my battery backup on computer had kicked on today although the furnace didn't completely fail.
I just read 26.7 volts at transformer with vent blower off,...
DIY Home Repair Forum: HVAC 01-04-2011, 07:59 PM
Replies: 23
Views: 7,925
Posted By Dtodd
Thanks paul52446m. The gas valve & the...

Thanks paul52446m.
The gas valve & the electronic board have both been changed out.
When it fails the gas valve stays open less than a second and the burner(s) nearest the flame sensor don't light....
DIY Home Repair Forum: HVAC 12-25-2010, 05:58 AM
Replies: 23
Views: 7,925
Posted By Dtodd
Had already checked the water drain as well as...

Had already checked the water drain as well as the vent fan intake and exhaust pipe for obstructions. Also checked the heat exchanger for cracks. and checked for carbon monoxide in the vent pipe....
DIY Home Repair Forum: HVAC 12-23-2010, 08:26 AM
Replies: 23
Views: 7,925
Posted By Dtodd
I am also having same intermittent problem with...

I am also having same intermittent problem with my York 15 year old York. Vent fan comes on, gas valve opens, spark igniter heats up, burners do not light all the way across, gas valve closes. Most...
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