The fan stays on when the thermostat is set to "ON" and the desired
temperature has not been reached. If I turn the thermostat off,
everything turns off. My concern is if the burners should be cycling
like they do (on 5 minutes, off 1 minute) when the unit is "ON".


Mikepier wrote:
wrote:
Hello,
My furnace recently went out (on the coldest day in Chicago
nonetheless). It turns out that the intermittent pilot control
(Johnson
Controls G779) failed from being overheated. We could see warping
around the circuit board, but it also turned out that the air
filter
was also plugged.

After installing a new pilot control and air filter, I am very
worried
that the heater may still be overheating. The heater has been on
for
several hours to heat the house up from a warm 37 degrees. The
burners
go on for 4-5 mintutes, and then shut off. After 1-2 mintutes they
are
reignited. The fan stays on for the whole time. This process
repeats
itself while the thermostat is still set.


-Charles

When you say the fan stays "on", I am assuming you do not have your
thermostat set at "fan on", in this case no, I don't think it's
normal.
The burners are suppose to stay on until the thermostat is satisfied.
Something else is not working right. You should call someone to have
a
look at it.