Re: Furnace burner remains burning after blower shuts down... intermittent concern


"FordTech" <jpcrawford@xxxxxxxxx> wrote in message
news:1133915934.389535.124850@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hello,
>
> My furnace recently started this. It goes thru the normal cycle but
> intermittently will continue burning after the blower shuts down. It
> will burn for maybe 30-45 seconds or so after shut down... then
burners
> off. Then after about 30 seconds the blower will come back on for
about
> 30 seconds.
>
> It just had its bi annual checkup with the local HVAC company about
30
> days ago and the only notation they made was possible low batteries
in
> the thermostat. I replaced those shortly after the service because I
> noticed this problem on the first use of the furnace, and
unfortunately
> have procrastinated finding the root cause since.
>

The first thing I would look at is the fan/limit switch, too...


.

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