Question about Ruud Matching Split Air Conditioner
We have a ruud central heat furnace and it turns on then shuts down after 20 seconds.hope u can help .thanks
If you noticed when it lit, there is an ignitor on the right side of the burners. On the left side is a flame sensor. Look for a lone orange or white wire leading to the flame sensor. Turn the power off and clean that flame sensor with a piece of steel wool. Reapply power and see how it does.
Posted on May 22, 2010
I need your model number to be sure, but I sounds like a flame sensor. If you have a hot surface ignitor(orange glow device) then in the same area there should be a small single wire sensor that sits in the flame Remove and wire brush the end and try that.
If you have a circuit board count the fast and slow flashes after it fails 3 tiimes and this will make a code
Posted on Jul 27, 2009
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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.
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