Question about Goodman CACF048B2A Air Conditioner
See if you are getting power to the inducer motor. Does the motor have continuity between the 2 leads? If not then the inducer motor is bad. You either have a bad board or inducer motor. My guess is the inducer motor. You gotta do them checks to confirm that though. It starts with that board which powers the inducer then to confirm it is on the proving switch has to get suction produced by the inducer. That sets of a timing sequence and the igniter comes on. After the end of the timing sequence the gas is release and is ignited . The flame sensor then has to confirm ignition. None of which is gonna happen if the inducer does not come on. I would suspect the relay on the board or a bad inducer motor.
Posted on Nov 13, 2010
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Posted on Jan 02, 2017
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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. Please see "limits, rollout switches & furnace control boards" further down on this page. 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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