10
Vermont Castings VCBVMN/MP & VCPVMN/MP Room Heaters
Problem
When control knob is pressed
in and turned counterclockwise
to ignition, there is no spark at
ODS pilot.
When control knob is pressed
in and turned counterclockwise
to ignition/pilot position, there
is spark but no ignition.
ODS pilot lights but flame goes
out when control knob is
released.
Burner does not light after ODS
Possible Cause
1. Ignitor electrode positioned wrong.
2. Ignitor electrode broken.
3. Ignitor cable pinched or broken.
4. Ignitor cable not connected to ignitor
electrode.
1. Gas supply turned off.
2. Control knob not in pilot position.
3. Control knob not pressed in while in
pilot position.
4. ODS pilot is clogged.
5. Air in gas lines.
1. Control knob not pressed long
enough.
2. Safety interlock is triggered.
3. Pilot flame not touching the thermo-
couple. Problem could be result of
one or both of the following:
•
Partially clogged ODS pilot orifice.
•
Low gas pressure.
4. Thermocouple damaged.
5. Thermocouple connection loose at
gas control valve.
6. Gas control valve damaged.
1. Burner orifice clogged.
2. Gas supply pressure is very low.
1. Main burner carry over ports
clogged.
2. Gas supply pressure is very low.
1. Burner orifice is clogged.
2. Burner ports damaged.
1. Not enough air.
1. Plaque(s) is damaged.
2. Inlet gas pressure too low.
3. Control knob set between locked
positions.
1. Residues from manufacturing
processes.
1. Air passageways blocked.
2. Air in gas line.
What To Do
1. Replace ignitor electrode.
2. Replace electrode.
3. Free ignitor cable, if damaged
replace.
4. Connect cable to electrode.
1. Turn gas supply on.
2. Turn control knob to pilot position.
3. Press in control while in pilot
position.
4. Call a qualified service technician.
5. Purge gas lines and repeat ignition
operation.
1. After ODS pilot lights, keep control
knob pressed in approximately 30
seconds.
2. Wait one minute, repeat ignition
operation.
3. Contact your gas company, gas
supplier or qualified service
technician.
4. Replace thermocouple.
5. Hand tight until snug then tighten
1/4 turn with a wrench.
6. Replace gas control.
1. Clean burner orifice.
2. Contact gas supplier.
1. Clean main burner ports.
2. Contact gas supplier.
1. Clean burner orifice.
2. Replace burner.
1. Check air passageways and
burner for dirt and debris (Refer to
Maintenance section)
1. Replace burner.
2. Contact local gas supplier.
3. Turn control knob until it locks at
desired setting.
1. Will stop after a few hours of
operation.
1. Check minimum installation
clearances and air passageways
for debris.
2. Operate burner until the air is
completely purged.
pilot is lit.
Delayed ignition.
Burner backfiring during
operation.
Yellow flames during burner
operation. (VCBV)
Burner plaque(s) does not
glow. (VCPV)
Slight smoke and odor during
initial operation.
Heater produces a whistling
noise when burner is lit.
Troubleshooting
