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intermittent fail to fire

Question from user Winter_Wookie at hvacadvice at reddit.com. Answer: Adjusting the gas valve didnt work because you fail to understand why its failing. Its not carrying the flame over. You need to clean out the entire unit with compressed air to get the dust out of the flame carriers. Answer

lennox g21q3601 pulse 21

Question from user Embarrassed_Dream581 at hvacadvice at reddit.com. Answer: Im posting a video of the sounds its making during the start cycle ending in the 1 hour lock out error code flashing. Answer from user Embarrassed_Dream581 at hvacadvice at reddit.com. lennox g21q3601 pulse 21

no c wire

Hey all, I have a furnace and radiant baseboard heating. So my thermostat it uses the typical 3 wire configuration. If I am understanding correctly I can repurpose the green wire as a c wire, however i would lose independent fan control. But correct me if I am wrong, this

blower motor help

Can someone please give me some advice. Blower motor broke, part was ordered from manufacturer and installed today. It sounds loud with a kind of deep undertone (I thought at first that machinery was running outside my home). Not so. When it cuts off it makes a noise as the