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There are too many reasons for this to happen so we would have to narrow it down. The sequence of operation on a Goodman furnace is usually:
1: Inducer draft motor comes on
2: Hot surface ignitor comes on and glows
3: Gas valve opens, lights burners
4: Flame sensor detects flames
5: Blower comes on
If the inducer motor never came on, then you start looking at power to the unit, thermostat issues, or inducer motor issues. Just a few places to start. Hope this helps!
Hello, sounds like a dirty flame sensor, this is a metal rod on the oppsite side of the hot surface igniter. All you need to do is remove the flame sensor and clean it with some steel wool and reinstall.
The sequence is Igniter comes on, valve comes on, flame sensor senses flame. If no flame is sensed after 3 tries, a lockout occurs. If you have a volt meter, check for 24-27 Volts AC coming to the gas valve, if your getting voltage to the valve but no gas, your gas valve is defective. It could be a intermittent problem, no matter, still a bad valve. if no voltage to valve, defective circuit board.
If the hot surface ignitor comes on and fires the burners, and then shuts back down, you need to take a look at the flame sensor. It is a ceramic rod with a metal tip that rests in the pilot flame. When heated from burners, it sends a signal to the main control module, circuit board, which ever this unit is equipped with to keep the burners on. It is a safety to shut the burners down if there is a problem. Take some fine steel wool to clean the metal tip on this and this should take care of the problem. If this does not do it, then 99% of the time you have a faulty control board or module. It will have to be replaced.It is where this flame sensor connects.It will continue to drop out of the circuit, and the fan will start and run. You're T-stat is good or the Hot Surface ignitor would not glow. You will need to take as much info you can from the unit, Goodman and the control, all numbers with you.You can purchase this part at a appliance parts house, or air conditioning parts house. Please keep me informed, I would like to hear back from you. I hope this has given you some direction to follow.Good Luck, Shastalaker7
Sounds like a dirty flame sense rod. Be sure to shut off power before removing the rod and cleaning it with sandpaper or steel wool. Do not touch or disturb the hot surface ignitor or you may cause it to fail.
It sound like you have either an ignition or 'dirty fuel' issue. The now Desa 'All Pro 200 T' that I have I fixed numerous times.. the approx $70 'ignitor'. But when the error code says flame' If you can tell that the thing started a flame... for a few seconds or at all.. then you can be sure that the ignitor is not the problem. .. yet. And that the flame is not a consistent lighted color.. which can meen diferent fuels mixed together..or water in the fuel. I'd try starting your heater with a high octane 'power boost' type fuel additive straight.. and then if it runs on that w/o a problem.. then you know its the fuel or fuel system.. Also you might check that the blue wire eye.. that 'looks at the flame' window is clean and wiped off with a clean cotton swab. md
if the flue is warm that would indicate that the flames lit for a short while. furnaces sometimes have limit switches that shut down the gas if the heat exchanger gets too hot. I would verify you have clean filters. and all registars open fully.
If the flames are not lighting verify gas valve is recieving the 24vlts. to open.
Also check ignition system it will be a piolet light or hot surface ignitor. you should be able to see both without much trouble. hs ignitor should get bright cherry red.
most parts for kero heaters are interchangable. go to desatech dot com for parts. check for a reset button for your heater. if no reset, does the fan run? your unit can use one of two ignition parts. a spark generator with a spark plug or a hot surface igniter. the unit uses a cad cell flame detector. you might need to replace this.
propane heater uses a hot surface ignitor. this operates off 120 volts and glows red/orange when actuated. it stays lit throughout the heater on operation. on the backplate of the combustion chamber is a high limit with two wires coming off it. these two wires connect to the spade connectors on the flame detector cappillary. Once you establish a fire, the flame detector generates a 750 millivolt signal which is applied to the pilot/main valve assembly. My diagram will show this.
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