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Ruud heater will not light consistently

I have a ruud heater and at times the ignitor doesnt come on, which means the gas doesnt come on and the furnace doesnt light. when the thermostat turns the blower fan on it continues to run and doesnt shut off. this problem was intermittent but seems to be happening all the time now. whats really strange about it is that if i go to the unit and turn off the power switch at the unit and turn it back on, the ignitor lights and the furance kicks on and everything is ok until the next time.

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I am having the same exact problem. The furnace is 6 yrs old. It is a RUUD Acheiver 90Plus.

Posted on Mar 03, 2013


If your house was built "back in the day" when there were only 2 prong plugs you will experience grounding problems.actually...lack of ground problems.flame sensor good, at times, and other times nothing.ground your furnace at control box to the nearest water pipe using 14 awg wire.

Posted on Jan 09, 2009

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Your furnace is going into a lockout condition, cycling the power resets the circuit board and it starts over. I will need to know approximate age and model of your furnace, it sounds like you have need to clean the flame sensor rod. However i need to know what i am working with.

Posted on Dec 18, 2008

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