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I have an old Lennox GH5-150S Gas Furnace. The problem I'm experiencing is sometimes it just stops working -- The pilot light always stays lit but burners don't light. I can usually depress a reset button on the front panel of the furnace for 30 seconds and upon release it fires up as usual. Even this is unpredictable because sometimes after the reset the burners will come on for 2 minutes and blower comes on and burners go out. Other times I push reset, the burners/fan will work fine for a day or so, and then nothing. I had a new thermostat installed recently, so it works fine. If anyone can help me in this I would appreciate it very much. It got pretty cold this morning, but it is working now after resetting like 6 times. Hopefully it will last longer now.. Thanks in advance.
