Problem with RUUD Furnace

Old 10-08-01, 12:28 AM
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Our 3 year old Ruud furnace is having trouble staying ignited. The gas is initially ignited and then after about two seconds there is a click and the flame goes out. It keeps trying this process repeatedly and fails. I have been told that there is most likely something (a sensor?) that has gotten dirty and needs to be cleaned. This makes sense since we have had a project going in the basement that has generated a lot of dust. What am I looking for and how do I clean it? Thanks.
Old 10-08-01, 02:51 PM
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The sensor is the element the pilot flame is heating. Removing it should be easy. Once it's out, clean it with steel wool or lightly with sand paper to remove any debris.

You also need to be sure the pilot flame is burning all blue. If it isn't, blow out the lint/dust etc. You should actually do this anyway, since the sensor is out of the assembly.

The information above is based upon the furnace having a spark pilot lighting ignition system. Whether the unit has a glow coil ignition or spark ignition {which lights a pilot} the clicking you hear prior to the burners shutting off may be caused by the solenoid inside the gas valve dropping out.

Regards & Good Luck
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