I have a propane central heating system that was installed probably about 1982. It is a Day & Night 394GAW060125. I never have had any problems with it except for once when I bothered the people in this forum with a problem that turned out (embarrassingly) to be the thermostat batteries. Am in SoCal and very rarely use the heater. Maybe once or twice a year. This winter I turned it on and it wouldn't run. I opened up the furnace access panel and noticed gas odor and no pilot light, and no pilot ignition "snap" sound. I quickly turned off the thermostat demand, waited about 1/2 hour for the gas to dissipate, then had my wife turn on the heater with the thermostat while I held a BBQ lighter flame at the location of the pilot light/igniter. The furnace ignited and ran perfectly. So I figured something was bad in the ignition hardware. The controller box (or whatever it is called) says "646A" on it, and the igniter box is a Robertshaw 785-00A. There is also a box with "lockout timer" written on it. I took out the igniter box and removed the primitive circuit board to check for any damage. I found nothing visibly wrong. I reinstalled it. Then I tried the heater function again, and the igniter worked, firing every second or so (I could both see it and hear it), but the gas wouldn't light. After a minute of firing and gas accumulation, I shut everything off, including the gas line to the furnace. I tried it again the next day, having done nothing to the system in the meantime. No spark. I then took out the igniter and cleaned the two points, where the spark jumps, with fine steel wool and put it all back together again. It didn't help. No spark. I suppose all the information above would indicate a bad electrical connection somewhere, but I checked all electrical connections and they are all snug fits. Including the high-voltage "automotive coil-type" wire going from the igniter box to the igniter. Can anyone give me some advice on how to proceed?

Hello, I have a York Furnace Model FG8B07512MU11A and it recently noticed that the furnace shuts off early, even though the thermostat is still set to higher. I can turn the thermostat off and then back on and the heat will start right up, but it will always stop 5-10 minutes later. It'll still turn on throughout the day on its own, but will never run longer than those 5-10 minutes. I opened up the furnace and saw that the LED is blinking red 7 times which is for "Ignition Lockout Due To Retries." After some research online, I read that this could be due to buildup on the flame sensor, so I pulled it out and cleaned it with steel wool. It wasn't too dirty to begin with though. That didn't seem to help. I did notice that the sensor was a little off center from the flame, so I adjusted it to be center, but it didn't help. I also read that it could be an airflow issue with the filters, so I swapped those out and even tried running the system without the filters, but that didn't seem to change anything either. I made a video of the furnace starting up and eventually running into the issue: [url]https://www.youtube.com/watch?v=5_6XPlIMx5g[/url] Important Timestamps: [LIST=1] [*]0:15 - Ignitor Starts [*]0:26 - Gas and Flames Start [*]0:30 - I show that the flame sensor is directly in the flame [*]0:45 - I show the LED is slow blinking amber color, which is for running normal with gas. [*]1:00 - Fan Starts for inside heat [*]4:40 - Flame Stops (Maybe gas cuts off? I'm not sure) [*]4:45 - Ignitor tries to start flame again [*]7:00 - System gives up and returns error code of 7 red blinking lights [/LIST] Unfortunately, I don't have a ton of experience with furnaces, so if anyone has any ideas, I'd really appreciate it! Thank you!!