It is most likely a safety shutdown from either low gas pressure or dirty electricity (brown out), although your furnace may need to be cleaned. There are "lock-outs" if ignition fails three times in a row.
If it doesn't do it again, don't worry about it.
Did you have a power outage?
that’s a Merry Christmas wake up :^)
Glad you have the heat back.
Could have been a bubble in the fuel line also - flame detect would be tripped, and just need a reset.. (if it’s an oil furnace)
I hate low quality electrical stuff, but I understand why it exists. If a manufacturer saves a dollar in production costs on a million units, that's a million dollars they saved.
Maybe you can profit from my stupidity. My furnace was doing the same thing. I could get it to start by removing the lower door and putting it back on, but it would not start without doing this every time.
$105 to determine that while the thermostat was functioning and correct voltage was reaching the furnace, the thermostat wire to the furnace was broken and resting against the screw terminal.
Stripping the wire and re-securing it to the screw terminal was all that was needed.
any ideas?
I have experienced this with my heat control.
Be very careful in removing the cover. Get a soft small brush and, remove the dust from the controls.
I was explaining this problem in a hardware store, when some-one came to me and explained the dust thing. I did as he instructed and, it solved the problem.
I hope this will work for you also????
Hey, we need someone with a clue over here about HvAC.
And between you and me, that someone sure isn’t me.
If it’s a 90+ efficiency they have a shutdown if there is not enough incoming air. I had that happen once. I think a plastic bag blocked the incoming air pipe. Once it shut down, the pressure released and the bag dropped.
Now, maybe you can help me with my dryer. My BIL and I were up till 12:30 last night tryeing to diagnose that. We found a broken sensor and ordered a replacement on Ebay.
Read your O&M Manual (Operating & Maintenance), or it may be an Installation Manual. The answer to the light code 'should be' in there. It may be something very minor (momentary low gas pressure).
That being said it could be in your Thermostat (the Light Code may point that out). Even digital stats go bad after several years.
But if its working now, don't be in a rush to call a serviceman, especially TODAY. And if you have to get one, get estimates.
Not knowing how old your furnace is, be careful of one thing under any case - if the service mans says "your heat exchanger is 'rusty' and you need a new furnace" - SHOW HIM THE DOOR.
But again, the answer lies in your manual to the light code.
(and yes, every furnace access door has a cut off safety switch behind it)
Go elsewhere on ‘net.
Find a site that allows you to enter your furnace manufacturer and the codes.
I did same for clothes dryer and bought $21 part. Installed it myself in about 3 minutes. Service call would have been $80, plus a $60 part, and waiting about 10 days for it!
Merry Christmas.