Question about Ruud UBHC Air Conditioner

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Soft lockout on comfortmaker gas furnace--how can we fix this?

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  • marine000099 May 11, 2010

    I hare a ruud air conditioner. we recently had the inside blower motor replaced but since then have there hasn't been much air flow. the outside unit is running and cold air comes out of the vent just not hard enough

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Try turning the power off for a minute and back on and if it happens again there is a problem

Posted on Feb 01, 2009

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Home furnace comfortmaker blowing cold air


Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.

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Cliff, this is Teng. Look inside your furnace if there is any flashing code. If your furnace is recently installed it should have electronic control board.

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YOUR FURNACE IS IN LOCKOUT MODE DUE TO A SAFETY FEATURE OF UNIT. USUALLY THE HIGH LIMIT HAS BEEN TRIPPED, OR YOU PRESSURE SWITCH FROM DRAFT INDUCER MOTOR FAULTY OR PLUGGED. IT WILL CONTINUE LOCKOUT MODE UNTIL THIS IS FIXED.

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I have a Ruud Achiever 90 Plus furnace that will not ignite and is showing a 'soft lockout' code on the LED panel. I've tried restting the furnace as per the manual and still no results. Am I missing...


Hello. a soft lockout typically happens when

1) the flame sensor is not detecting the flame
2) pressure switch fails to close

Since your burners are not igniting I would check the pressure switch, make sure there is no obstruction in the flue pipe, the hose going from inducer to pressure switch is not kinked, loose, obstructed, or have water in it. If that all checks out good then your pressure switch is bad and must be replaced. If you need any further assisatnce let me know

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This is a Dayton gas furnace model GF9S120D20UP11H and i am getting a flash code of ignition lockout due to recycles. how do i fix it? i have taken all the filters out and washed them and also checked...


Usually a lockout code means it tryed so many times and then it locks out or stops. First, when a furnace is locked out you have to kill the power to the furnace to reset the lockout. I don't know this furnace but there are manual resets around the burner called flame rollout switches that have buttons in the middle that have to be pushed back in. Also the power vent has to come on when the furnace gets the signal from the thermostat. This is proven by a flow switch with a rubber hose on it. The next step is a 30 sec. purge, then the igniter glows or sparks and then the main burner comes on.
The other switches are hi limit on the front wall of the heat exchanger. That might get you started. If you have anymore questions rspiak1@cogeco.ca

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Gas furnance would only operate for about 3-5 minutes then turn off. Replaced gas valve on furance for a Rudd comerical A/C 4 ton unit model UKKA-A048JK10E. Now the blower fan turns on but the igniator and...


the rollout switches will be located at the ends of the burner assembly and will have a manual reset. they must be manually reset to ensure that the problem has been corrected. Most units will go into a soft lockout for a time and eventually a hard lockout if the problem persists. Go to tempstar.com and go to their troubleshooting section for a gas furnace. the codes they give are pretty common for alot of furnaces and see if they help

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Comfortmaker furnace will not light!!


Make sure you have gas to the unit and the switch on top of valve is turn to on. Can you here the gas valve click? It igniter comes on and a delay and the gas valve should come on. Kill power to furnace to reset control board. Rus Let me know how it goes.

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It means that the furnace isn't igniting and for safety the control board is preventing the gas valve from opening. Turn off the power to the furnace for a few seconds then observe what the furnace does in heat mode. Some furnaces will run the blower for a minute after you power it back up. After that see if the furnace tries to come on. If you are still getting the code then one of you high temp limit or roll out switches has tripped. Now is the time for a service tech. Make sure that you check you filter and air flow too. Low air flow means the furnace may be over heating.
The other thing is the hot surface igniter. Look closely at it with the power off. Do you see a white spot on the element or a crack. If so the HSI is bad. It's an easy replacement but DO NOT touch the carbon element with your fingers and be very careful handling it as it is EXTREMELY fragile.

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