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B-Vent Specialty Gas Fireplaces
TROUBLESHOOTING
While MHSC has made every reasonable effort to ensure this appliance operates properly and satis-
factorily, sometimes problems do arise. The following troubleshooting chart lists several problems with
their probable cause and remedy. Any adjustments and/or replacements must be by a qualified person.
Do not replace any component with a different type. Use only components supplied by the manufac-
turer for this appliance.
Problem
Probable Cause
Remedy
Flame too large
1. Pressure regulator set too high
1. Reset, using manometer
2. Defective regulator
2. Replace
3. Burner orifice too large
3. Replace with correct size
Noisy flame
1. Too much primary air
1. Adjust air shutters
2. Noisy pilot
2. Reduce pilot gas
3. Burr in orifice
3. Remove burr or replace
Yellow or excessive flame
1. Too little primary air
1. Adjust air shutter
2. Clogged burner ports
2. Clean ports
3. Misaligned orifices
3. Realign or replace burner
4. Clogged vent system
4. Clean
Floating flame
1. Blocked venting
1. Clean
2. Insufficient primary air
2. Adjust air shutter
Delayed ignition
1. Improper pilot location
1. Reposition pilot
2. Pilot flame too small
2. Check orifice, increase gas
3. Burner ports clogged
3. Clean ports
4. Low pressure
4. Adjust pressure regulator
Failure to ignite
1. Main gas off
1. Open manual shut-off valve
2. Defect in gas valve
2. Replace
Burner won’t turn off
1. Defective auto valve
1. Clean or replace
Burner won’t turn on
1. Defective auto valve
1. Replace
2. Defective pilot sensor
2. Replace
3. Defective switch
3. Repair or replace
4. Defective auto pilot valve
4. Replace
Burner & pilot
1. Poorly functioning vent system
1. If pilot can be relit but main burner
flame go out
& pilot go off after ignition, have vent
system checked and corrected im-
mediately
2. Gas supply interrupted
2. Try relighting pilot and main burner.
If pilot won’t relight, check thermo-
couple and control
3. Defective pilot or control
3. Replace