Dometic RM2852 fridge wont stay lit ?
Hello All, It's been a LOOOooonnnnggg time since I've been around here, but Open Roads Forum has always been my "Go-To" place when I need to get knowledgeable experienced advise... so here I am. I...
Forum Discussion
Depending on product number whether fridge uses a thermocouple and electrode OR just a 'spark electrode'
Both are types of sensors but depends on design of circuit board
Thermocouple heats up...internal expands making up circuit (electrode would just be means of high voltage spark)
Later production models only used a spark electrode for spark and flame sensor
Spark Electrode uses a signal generated by the flame----rectification (ionization)
This milliamp signal returns to circuit board via the spark electrode to prove flame lit
IF spark electrode connections/terminals are dirty/corroded.....no milliamp return signal
If spark electrode is dirty/carboned up......no milliamp return signal
If spark electrode ceramic insulator is cracked,,,,,,milliamp return signal goes to ground---no return to circuit board
Product numbers with both thermocouple and spark electrode
Up to 921146154
Product numbers with JUST spark electrode
921146167 and later
Both are types of sensors but depends on design of circuit board
Thermocouple heats up...internal expands making up circuit (electrode would just be means of high voltage spark)
Later production models only used a spark electrode for spark and flame sensor
Spark Electrode uses a signal generated by the flame----rectification (ionization)
This milliamp signal returns to circuit board via the spark electrode to prove flame lit
IF spark electrode connections/terminals are dirty/corroded.....no milliamp return signal
If spark electrode is dirty/carboned up......no milliamp return signal
If spark electrode ceramic insulator is cracked,,,,,,milliamp return signal goes to ground---no return to circuit board
Product numbers with both thermocouple and spark electrode
Up to 921146154
Product numbers with JUST spark electrode
921146167 and later
