Lady DIY Needs Furnace Help? I have a (12-15 year old) Janitrol furnace next to a programmable...
I have a (12-15 year old) Janitrol furnace next to a programmable thermostat. Sometimes the furnace comes on (ignitor, burners, blowers) in the morning, runs, afterwards shuts off previously it's reached the desired temp. The burners will come on repeatedly while the blower is still running, and I hear an intermittent series of metallic clicks. Other times the furnace allows the heat to drop below the desired set point. It won't continue running to properly fry the house.
If I take the furnace cover past its sell-by date, and push the button underneath, it will OFTEN (but not always) come on and run properly the rest of the day.
I know where on earth the ignitor and the heat sensor are located but not which could be the problem and I don't know how to rob out/replace either. Some sites articulate to clean the sensor beside steel wool...others say NO. Some articulate look through the peephole to check for flashing red lights to diagnose, but I don't hold one.
Any help/advice w/be SO appreciated.
Answers: never use sandpaper to clean a flame sensor rod. this is a adjectives error. when a flame sensor quits conducting its because it has become insulated by oxides thus the tiny current that flows through the flame (so small its measured surrounded by micro amps) can no longer and a flame failure idiosyncrasy is generated. the gas spigot closes and the glow fishing rod is re heated in an attempt to re lite the flame (relays usualy bar the switching that turns on the glow block and they make a series of metalic clicking sounds when they opperate) anyways put money on to the oxides. sand paper grit is made from adjectives kinds of different oxides so while you may mark off adequate oxides to get it to stay on for a while the warmth of the flame will just recoat the flame rod near more oxides. the proper way to verbs a flame rod is with a fine wallet or wire brush. never ever use sand rag. it sounds to me though like you ought to christen a technician. I admire you for trying this but if you dont know how to remove the flame sensor, this is best not here to someone with the know how.
Frankly, sounds approaching a thermostat problem to me.