igniter glows and fire does not start - 3 possible cause

1. No gas service

2. Bad gas valve

3. Bad control board

Measure the voltage of the two wires to gas valve. After you see the igniter glows, you should measure 24 v for a couple of second just before the igniter goes off. You can only see it for one or two seconds, so pay attention to your meter. 

If no voltage detected, the board is bad. otherwise, gas valve is bad. 

The transformer is good because it blows air. 

 

所有跟帖： 

• Thank you very much. 1 is available. The problems could be 2 an -youzifive- ♀ (0 bytes) () 11/20/2016 postreply 19:00:44

• and 3, Is it the problem that comes from limit switch? -youzifive- ♀ (0 bytes) () 11/20/2016 postreply 19:08:11

• no. limit switches are fine. -TDF樂在其中- ♂ (0 bytes) () 11/20/2016 postreply 20:51:58

• In this case, is it possible that the thermocouple goes wrong? -youzifive- ♀ (0 bytes) () 11/21/2016 postreply 07:49:48

• 今天本来想测gas valve 的电压， 刚开始 igniter 还glow , 但再次启动就不再glow， -youzifive- ♀ (235 bytes) () 11/21/2016 postreply 12:22:54

• Finally, found the control board was bad. Soldering parts got br -youzifive- ♀ (0 bytes) () 11/22/2016 postreply 15:12:14