Question about Dometic Refrigerators
If voltage to ignitor bad ignitor if not sparking if no voltage to ignitor bad control board
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Posted on Jan 02, 2017
OK, if the furnace is not lighting for even a few seconds, you have either a bad gas valve, bad wire, bad control module or no gas. The pressure switch is not the issue. Check all wires to the gas valve and look for 24 volts across them when the ignitor glows and you hear the click. Then test for 24 volts to ground. It could be a bad ground wire.
Posted on Oct 21, 2008
I have a Thermador Gas Range PG364GDBS - Oven, 4 burners, and center griddle. All are gas. The four burners and gas oven work fine. The griddle just stopped working, no spark. Turning on the griddle control, the gas valve opens(hear it), gas flows (smell it), but the ignitor will not spark (no loud or faint spark that I can hear). I got a replacement ignition device (mount at the burner) thinking it might be the problem, but still no spark. I checked the AC voltage at the terminal and measured 39 VAC between the terminal and ground. Not sure if that is the correct voltage. Any insights or advice would be great.
Posted on Dec 10, 2009
The older units has a 3 VDC glow coil the newer units have a 12VDC igniter.
Fromwhat your described above the next paragragh is your ignition system.
The igniter control voltages in the newer SPARK type igniters are (+) = 12VDC, (L)= high voltage lead (Spark plug voltage! I.e ruin your meter type voltage), (-)= Ground L is the lead that passes the HV spark from the control unit to the ignitor plate. The L lead should pass one heck of a hit if is workng correctly.
If not look at the HV lead to see if it is grounding out somewhere.
If the gas safety valve is not sensing gas pressure... you will not have 12VDC to the + terminal of the ignition moudule.
With the gas on and you have 12VDC at the ignition module + terminal then most likely the ignition module is bad.
Posted on Apr 17, 2010
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