Question about Ruud UBHC Air Conditioner
In order to diagnose your problem, you will need to set your therm on emergency heat only, watch the cycle in your furnace, and tell me what it does once it tries, and how many times it try's and what it does once it's tried and stopped?
Posted on Dec 06, 2008
Tips for a great answer:
Dec 25, 2012 | Air Conditioners
Here is a tip that will help you try to figure out why your furnace is not working.
Basic Furnace or Heating System Troubleshooting
Dec 26, 2010 | Ruud Air Conditioners
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.
Nov 26, 2010 | Ruud UBHC Air Conditioner
Mar 30, 2010 | Ruud UBHC Air Conditioner
Feb 19, 2010 | Ruud UBHC Air Conditioner
Oct 16, 2009 | Ruud Central System Air Conditioner
Sep 30, 2009 | Ruud UBHC Air Conditioner
Jan 13, 2009 | Air Conditioners
Oct 23, 2008 | Ruud Air Conditioners
56 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: