Question about Omega Trane Furnace Draft Inducer Blower 115 Volt Variable Speed Fasco # A190

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Central heat/air unit for home blows cold air

I turn the unit on. It blows heat for about 3 minutes then it turns to cold air and wont shut off, until I shut it off.

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  • Anonymous Mar 01, 2009

    I have a 1994 Trane XE90 furnace that just started doing the same thing. It will heat up and run okay for a while but after a random number of normal cycles, the blower won't shut off. I have to shut the furnace off and restart it to get any heat. Sometimes I can see the burners start to light but stop or misfire.


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Flame sensor is dirty

Posted on Aug 10, 2009

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Sounds like your drain is stop up in wich is filling your air swich up with water the causes a miss fire the indoor motor will run untill you turn it off when this happens

Posted on Mar 13, 2009

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York furnace code 7

The error 7 shows that the gas failed to ignite. That is because the sensor does not sense any flame. This can be because the sensor is dirty. You should look in the area of the jets for a wire that may be purple in color. It attaches to a bare metal probe that is shaped like the letter L This probe extends into the path of the flame from the jets. When it detects flame it tellls the controller that everything is good. When it gets sooty or dirty from use it cannot detect the small electric currents that are present. Clean it with scotchbrite. Error 7 means that the furnace is locked out and wont restart for an hour. You can shut the power off and turn it back on to reset it.

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My furnace is in a 1994 manufactured home. It is

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My york diamond 80 can be fired up, but it is shut off automaticaly after approx. 20sec. This can be repeated 3 times. I beleive the fun and borad panel are working fine.

The flame sensor might have dust build up on it. The flame sensor makes sure that the system has ignited before it starts the main blower. If it ignite and burns for 15-20 seconds then goes out that is most likely your problem. Identify a probe that is in the direct path of the flame(usually in the last burner tube from the gas source), it will have one wire coming off of it and usually has one screw holding it in place. As time goes by the sensor will get a build up on it and stop functioning. Turn the power to your furnace off, then remove the screw and then gently pull the flame sensor out. Using a MILD abrasive like panty hose of paper towel (DO NOT USE sand paper) clean the sensor and then put it back into place. Tighten the screw and then turn your furnace back on. That should fix your problem.

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Mar 22, 2009 | Omega Trane Furnace Draft Inducer Blower ...

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