Troubleshooting Test C - Burner Ignites But Does Not Maintain Flame - Norcold N305 Service Manual

Troubleshooting, cont'd.
Troubleshooting Test C - Burner ignites but does not maintain fl ame
1. Perform the "Diagnostic Pre-Checks."
2. Go to the fl ow chart below.
0 milli-volts on
both terminals.
Replace
thermocouple.
N305, N306, N305.3, N306.3
Burner ignites but does not maintain flame.
Is the main gas
supply valve
open?
OFF position?
YES
NO
Set gas control
Open main gas
to LO, MED, or
supply valve.
Check for voltage (milli-volts)
at terminals of interrupter.
15 - 30 milli-volts
10 - 15 milli-volts
on one terminal,
on both
0 milli-volts
terminals.
on the other.
Replace
Replace
gas control.
thermocouple.
Is gas control
Is exhaust vent
set to the
unobstructed?
NO
YES
Remove
obstruction from
exhaust vent.
HI posiiton.
Is tip of
thermocouple in
flame & clean?
YES
Adjust or clean
thermocouple.
16 - 30 milli-volts
on both
terminals.
Replace
gas control.
36
Is propane gas
pressure
2.6 - 2.7 kPa?
NO
YES NO
Correct propane
gas pressure.
Is propane gas
at tap tee
10.5 -11.5 inches
YES
water column.?
NO NO
Replace
thermostat.
www.norcold.com
YES