Goodman Furnace gmp100-5

[hawgwildtours]

I HAVE A GOODMAN FURNACE THAT IS BLINKING 5 TIMES ON THE LED..THE VENT FAN COMES ON AND THEN AFTER A FEW SECONDS THE BLOWER FAN STARTS AND THE LED BLINKS 5 TIMES OVER AND OVER...THE HIGH LIMIT CIRCUT IS CLOSED..TROUBLESHOOTING SAYS 5 BLINKS MEANS IT IS SENSING A FLAME AND THE CAUSE IS A STUCK GAS VALVE...I DONT THINK THAT THE GAS VALVE IS STUCK OPEN AS THERE IS NO FLAME OR GAS???I AM THINKING CHANGE THE CONTROL BOARD...ANY IDEAS.THANKS FOR ANY HELP

[jumptrout]

Well if there is no flame the gas valve would be stuck closed.

On a call for heat use your volt meter to verify low voltage at the gas valve.

If you have voltage tap on the gas valve with the handle of a screwdriver.

This sometimes will open the valve.

If this works,replace the gas valve.

If it does not work,replace the gas valve not the control board.

If you do not have voltage at the gas valve,verify all circuits(roll out switches,pressure switches) etc. from the board to the valve.

Re-set,repair or replace the defective part.

[hawgwildtours]

It never gets to the stage to open the valve. It never sends power to the glow igniter

[jumptrout]

I am sorry. When you stated the high limit circuit is closed I mistook that as power to the ignitor.

Edited December 3, 2011 by jumptrout

[hawgwildtours]

It was the board. Replaced last nite. All is well. Thanks