My carrier weathermaker 8000 will not blow gas when the igniter lights up

SOURCE: carrier furnace weathermaker 8000

. Several times of recyling power normally brings the furnance up. Though the failure code has always been 31, there are several different behaviour when the blower starts after reset :
a. blower simply creases.
b. there is an attempt to start the heating unit (I hear the high pitch noises), then everything stops.
c. there is an attempt to start the heating unit (I hear the high pitch noises), once I see the orange glow from the coil, normally the gas is lit up and the unit starts working.

SOURCE: Flame sensor dirty

Sandpaper lightly scrubbed over the sensor tip to remove any contamination.

Sometimes cleaning is not enough and the sensor must be replaced.

SOURCE: I have a Carrier Weathermaker 8000 furnace. it

If you're sure the igniter is good and the controller is sending voltage to gas valve to open, but not to the igniter then, yes, the controller is bad. The only way to know for sure is to remove the igniter's molded plug from the board and test voltage directly at the board. You should get about 100-120 vac to the igniter.

Testimonial: "thanks alot i will test that."

SOURCE: CARRIER WEATHERMAKER 8000.NOT SURE HOW OLD. HAVE

sounds like the roll out switch may be sensing a clog. here is a website that can explain things better, hope it helps Tim:

http://arnoldservice.com/Troubleshooting_Heating_Problems.htm

SOURCE: carrier infinity 80 won't heat

does your burner flame up and then go put two or three times if so
all you have to do is take out the burner and clean all the soot out of it and then wipe off the sensor