Make sure the draft vent is moving freely. I had one that would stay closed the first time the boiler fired up every fall. All I had to do was go down and flip it open and closed then it would be fine all the rest of the season. If you use a powervent to vent the exhaust to the outside there is a small tube inside it that detects air movement. should that become plugged the burner will not fire.I had to shove a small steel wire in it to clean it out one time. The powervent would start but the burner would not fire. It would pop the reset switch on the burner if I recall.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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