Furnace question
 

hey guys

turned on the heater for the first time today and saw that the gas flames weren't holding the flame.

the flame will come on for 30-40 seconds and then turn off. in about 20-30 seconds it'll come on again for another 30-40 and turn off. the fan in the furnace spins.

anyone here a furnace tech? not even sure where the hell to start.

any help appreciated.

model: lennox diplomat
age: atleast 7yrs

I'm not sure but maybe the thermocouple that detects the temp is starting to go?

thats exactly what it sounds like. try to move it a bit closer if that doesn't work buy a new one they are super cheap. Just take the old one off and match it up at home depot.