Question about Heating & Cooling
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Posted on Jan 02, 2017
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Nov 23, 2013 | Heating & Cooling
Feb 13, 2011 | Mr. Heater MHU75NG
Jan 20, 2011 | Mr. Heater Natural Gas Garage Heater -...
Dec 15, 2010 | Mr. Heater Natural Gas Garage Heater -...
1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor.If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.
Dec 11, 2010 | Mr. Heater Natural Gas Garage Heater -...
Apr 18, 2017 | Mr. Heater Heating & Cooling
Sep 30, 2010 | Mr. Heater (F274825)
Nov 06, 2009 | Mr. Heater (F274825)
Feb 03, 2008 | Heating & Cooling
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