Goodman GMS90703BXA Heater "control wont switch vent" Questions

wont turn on because we dont know how to take the lockoff, please jhelp. This is the manual for a different model heater but maybe it operates the same way.... http://www.rural-energy.com/publications

...wont start burners Check for 24 volts across the gas valve when Ignitor is glowing. If no, bad board. If yes, bad gas valve or blockage. On a call for heat, the 24 volt thermostat sends a signal to ...

...wont light Heater has been working for 2 months fine. Today won't start. LED flasing 2 flashes. When it was woking your could hear the ignition snapping to light now you don't hear ...

...WONT FIRE UP GOODMAN GMNT12-5D On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either ...

...control). Your furnace has a diagnostic chart on the reverse of the lower panel incorporated in the wiring diagram. One blink tells you that it is a failure but wont tell you where to start

...wont start is it smart valve Hi, if you have replaced the control board and pressure switch, you need to check the sequence of operation. Starting with the inducer motor, must start up to pressurize ...

...wont open (roll out switch failure) My GMP075-3 will start and fire for about 1-2 minuites then the gas valve will close and the unit will not restart. When I test voltage accross the valve and it ...