Dometic Fridge Problem in a brand new unit
We have a 2021 Dynamax Isata 3 with a Dometic DMR-702 refrigerator that is acting up and could use some help from all of you experts on this topic. I have a request in to a warranty dealer to help wit...
Forum Discussion
Old-Biscuit wrote:
The error code is always the same -- two blinking lights,
One is LP
*Gas ignition failed. The gas flame has not been ignited after 45 seconds.
Other -- Temp Setting 1-3
1) *Disconnected gas valve or hardware fault in the gas operation system. (Check the Wire Connections ON Gas Valve and ground connection J1 Position on Circuit Board)
(Check the Spark Electrode wire connection/ceramic insulator for cracks and electrode position/gap over burner)
2) *A faulty temperature sensor device or a fault in the associated electronic circuitry has occurred. (that would be Thermistor connection or the circuit --- J3 Position on Circuit Board)
3) *DC voltage is out of range (drops below/exceeds the limit values approx. 8-18V DC). Very Wide Range on DC Voltage
Suspect #1
Spark Electrode is DUAL Function....provides High Voltage Spark for Ignition AND Return path for Flam Proving Signal (Current generated by flame ionization ---circuit board senses this current/keeps DC on gas valve. No signal/DC to gas valve dropped/error code triggered
Current is only a few milliamps so doesn't take much to stop it/go to ground
Installation & Operating Manual
Lp light blinking is no gas flow through the valve .
Second light blinking is gas valve misfunction or hardware misfunction .
Check for air or obstruction in line check ground and voltage at gas valve
