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Old 10-21-2020, 12:15 PM   #1
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Norcold Fridge Ignition Issue

Hi All- So my Norcold fridge (Model 6162) has a propane ignition issue. Roughly 1 out of 4 times you can hear the fridge thermostat click and you can hear the burner come on only to shut off after 4 or 5 seconds and the red check light comes on the fridge. I can always get it to ignite if patient, sometimes just wait a few minutes, shut fridge off and back on and it will stay lit. This seems to be an issue with the thermocouple not telling the ignition control that the flame is on.

It looks well seated in the nice blue flame, no apparent corrosion on it, and when lit the fridge works great. As stated, this only happens sporadically, roughly every fourth time the igniter lights. The thermocouple wire enters the propane ignition module and looks like it would require removal of the black ignition module to remove it, if even that is the issue. The module says on it "not field serviceable". Any thoughts on this welcome. Thanks in advance!
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Old 10-21-2020, 12:49 PM   #2
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6162 doesn't use a thermocouple......the Spark Electrode provides high voltage to ignite the gas AND is used as return path for the flame signal that is a result of flame rectification
That signal is only a few milliamps and doesn't take must to restrict it being sensed by circuit board

When was last time you CLEANED the burner assembly?
Propane system is only 11"WC (0.39psi) and has a narrow ignition range
Proper air/fuel ratio results in correct flame temp...clean spark electrode/wire connection provides reliable flame proving signal


Here is a Service Manual that has step by step testing procedures
http://bryantrv.com/docs2/docs/600.pdf
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Old 10-21-2020, 01:41 PM   #3
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Propane Fridge

Thanks OB- will take a look at the manual link.
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Old 10-22-2020, 06:02 AM   #4
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I had same issue, i replaced ogniter and the ign wire, i wasnt going to play around with one or the other... it was 24 years old in a 96...

I also had a perfect flame for a few seconds.. cleaned and actually a low hour RV... for its age..
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Old 10-22-2020, 10:17 AM   #5
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Thanks, sibe- looks like you have to remove the ignition module to replace the ignitor wire?
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Old 10-22-2020, 02:42 PM   #6
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The Spark Electrode wire Unplugs from Igniter Module

It just has a spade connector on the end of wire...plugs onto transformer terminal




600/6000 Series Parts List
https://www.thetford.com/wp-content/...Parts-List.pdf
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Old 10-22-2020, 06:46 PM   #7
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Thanks, OB- I thought that may be the case but it seemed pretty fastened into the ignition module and was reluctant to force it. This cable seems pretty basic- like it either works or it doesn't provided the connection into the module is corrosion free and the spark end is properly situated over the burner orifice. Can the cable go bad?
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Old 10-22-2020, 06:51 PM   #8
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Quote:
Originally Posted by dukealumni View Post
Thanks, OB- I thought that may be the case but it seemed pretty fastened into the ignition module and was reluctant to force it. This cable seems pretty basic- like it either works or it doesn't provided the connection into the module is corrosion free and the spark end is properly situated over the burner orifice. Can the cable go bad?
YES the wire can be 'disconnected' inside the ceramic insulator

Spade connector should be TIGHT...might need to use needle nose pliers to grip/pull spade off terminal

Simple continuity test can be done as shown in manual
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Old 10-22-2020, 07:32 PM   #9
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Good to know- thanks again for all your contributions to this site.
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