Norcold N821 'H' code is AC Heater failed Open
2 causes;
Bad Element
Bad circuit board
Tests are check heater resistance....S/B 38-53 ohms
**Lower the ohms the more likely element is failing
Per Norcold
Refrigerators with serial number lower than 854647 heater is rated for 300 Watts/2.7 amps @ 110Vac and has a resistance of 41.25 ohms.
Refrigerators with serial number 854647 and higher heater is rated
for 300 Watts/2.5 amps @ 120 Vac and has a resistance is 48 ohms
With Fridge in AC MANUAL
Check the amp draw when heater element is energized
OR
Unplug the 2 element leads from circuit board
*AC HT Hi1 (Hot) and AC HT Lo1 (Neutral)
Measure AC Voltage at those terminals
*NO AC Voltage ....Bad K2 relay....replace the board (UNLESS 5A Fuse is bad)
*Got AC Voltage....replace element
Suggestion:
Ask MOD to delete your other post about same issue/and response
Changing Norcold refrigerator heater element in Monaco Forum
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