I have a Lennox G51MP furnace. Just built this house last year and the furnace was installed in November, 3 months ago.
Last night, it was 0 degrees out. When my wife woke up me for work, she said "its feezing". When I went down stairs, the thermostat said 51. The furnace obviously shut off in the middle of the night. And, my wife babysits a 3 month old everymorning.
Luckily, I put a set of gas logs in when I built my house, so I quickly got them burning and within an hour the living room was toasty.
I got out my manual from lennox and read the trouble shooting guide.
When the furnace first comes on, both the Red and Green LEDs blink fast, which the manual indicates as normal operation.
It goes through this cycle and then attempts to light... You see the pilot light come on, then a flame, then the flame goes out.
It does this seeral times for about 3-4 minutes then finally shuts down altogether.
Now, A different code come up. Alternating slow flashing red and green. The manua indicates the follwing.
"Watchguard-Burners failed to ignite, limit open longer than 3 minutes, or flame sense lost 5 times in one heating cycle."
Can anybody tell me what I need to do to fix it????
Is there a part that is malfunctioning?
Please, if you know the cause of this, give me some advice.
My furnace guy is out of town until monday.