Furnace won't start up

Old 12-07-11, 02:43 PM
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Furnace won't start up

I have a Pulse 21 lennox furnace, I believe the model number is G21Q3-80-1. The furnace kicked after work but did not reach the desired temperature. I went down and took the panels off the green light is on the control box but when I go to hold the safety switch in I don't hear anything, I know before I was able to hear a clicking sound and it would fire up. This is a propane furnace also. Any ideas would be greatly appreciated Thanks
Old 12-07-11, 07:31 PM
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Well, a PULSE is a furnace that can not be diagnosed over the internet. Parts are becoming hard to find for your furnace. Often it is that control board that fails. It needs maintenance every year! It also needs the heat exchanger pressure tested by a lennox tech. Many companies wont work on that furnace. It is the only furnace ever on the market that operates the way that it does. Find a lennox company to work on it.
Old 12-07-11, 09:30 PM
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Unfortunately, HVAC Tech speaks the truth.

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