I have a Ruud model # UGPL-10EBRMR 2 stage natural gas furnace. When the thermostat kicks on the initial stage (stage 1) the blower comes on but the ignitor never functions. I can manually push the thermostat up 3-4 degrees (which engages stage 2) and the function lights and cycles normally. Any assistance is appreciated.

SOURCE: Ruud achiever 90 plus gas furnace

I have 2 Ruud Achiever 90 Plus UGRK's. Units were install in 2004. One unit flames' out after ignition just prior to the fan kicking in. Confirmed gas value is functional by switching valves. Check wire connections. Could it be the remote sensor or another 24 volt sensor at the IFC that locks out the gas valve?

SOURCE: Clunk noise Ruud Furnace

I had the same problem, the motor shaft and bearings were going bad. There was about 3/16" travel on the shaft that the blower attaches to. I replaced the motor myself and it runs nice and quiet. I have had that noise that you describe for over 8 years, but it got real noisy about a week ago. I talked to the maintance department about it where I work and they said the motor bearings were probably going bad. They were right, I took the motor out of the furnace and they took it to a parts store and got me a new one $270.00 for it. It is a special motor due to the fact that the frame mounts bolt directly onto the motor housing. Make sure if you do this job yourself that you take the motor to the parts store so that they can match it up. The guy at the store told our maintance man if it didn't require the bolt holes in the motor housing it would have been $100.00 cheaper.

SOURCE: Ruud Silhouette II Fails to Ignite

sounds like you have bad flame sensor or the sensor is in a bad postition. To get eliminate the lockout turn the power off to the unit and back on again. Look at the circuit board light and see what the troubleshooting code is.

SOURCE: Hi, I have a ruud silhouette II furnace. The

Sounds like a flame rod issue or the flame is not getting to it in time. The flame rod is located either far right or far left in the burner box and has only one wire going to it. It should be in line with the flame on a burner. The computer allows only a second or two for the all burners to lite and to get to the flame rod. Check the flame travel from burner to burner. You may have to clean the burners, the flame tray to each burner and the flame rod. Also check any electrical connection at the flame rod, circuit board and the grounds to the furnace cabinet.

SOURCE: I have a Ruud Silhouette

I had the same problum with my heater to no end. I thought it was the th-sat . still don't know if it was . one of the sencers I was feeling, and the disc snapped in and the heater ran but on heat. turn off power and unplug the power cord and removed the sencer and taped it until it pop back out and when it did I resemble back in place.repluged all back up. turn the heater back on and the flame stayed on . LET THEIR BE HEAT. I played with it for 4 hrs.I don't know if this was the problum .will have a teck look at it to be safe.