Troubleshooting - Mr. Heater MHVFGH30LPT Operating Instructions And Owner's Manual

TROUBLESHOOTING

NOTE: All troubleshooting items are listed in order of operation and likely occurrence.
WARNING: Only a qualified service person should service and repair heater.
CAUTION: Never use a wire needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.
Make sure grille guard is in place before running heater. If screen or grille guard is removed for servicing it must be
replaced prior to operating the heater.
WARNING: If you smell gas:
• Shut off gas supply
• Do not try to light any appliance
• Do not touch any electrical switch; do not use any phone in your building
• Immediately call you gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint,paint remover,
cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and
create odors and possible discoloration of walls and ceilings.
OBSERVED SYMPTOM
When igniter button is
pressed in, there is no
spark at pilot
When ignitor button is
pressed in, there is a spark
at the ODS/pilot but no
ignition
ODS/pilot lights but flame
goes out when control
knob is released
Unvented Liquid Propane Fired Room Heater
POSSIBLE CAUSE
Igniter electrode positioned wrong
Igniter electrode is broken
Igniter electrode not connected to igniter Reconnect igniter cable
Igniter cable pinched or wet
Broken igniter cable
Bad Piezo igniter
Low Battery
Control knob not fully pressed in
Control knob not pressed in long enough
Equipment shutoff valve not fully open
Control Valve damaged
Gas supply turned off or equipment
shutoff valve closed
Control knob not fully pressed in while
pressing ignition button
Air in gas line when installed
ODS/Pilot is clogged
Control knob not in pilot position
Gas regulator setting is not correct
Thermocouple connection loose at
control valve
Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This
problem could be caused by one or both
of the following:
a. Low gas Pressure
b. Dirty or Partially clogged ODS/pilot
Thermocouple damaged
Control Valve damaged
REMEDY
Reposition electrode
Replace electrode
Free igniter cable if pinched by any metal or tubing. Keep igniter
cable dry
Replace igniter cable
Replace control valve
Replace battery
Press in control knob fully
After ODS/pilot lights, keep control knob pressed in for 30
seconds
Fully open equipment shutoff valve
Replace control valve
Turn on gas supply or open equipment shutoff valve
Press in control knob fully while pressing ignition button
Continue holding down control knob. Repeat ignition operation
until air is removed
Clean ODS/Pilot (see "CLEANING AND MAINTENANCE" on
page 1 1)
Turn control knob to pilot position
Replace gas regulator
Hand tighten thermocouple nut until snug, and then tighten
1/4 turn more
a. Contact local gas company
b. Clean ODS/pilot (see Cleaning and Maintenance, page 1 1)
Replace thermocouple
Replace control valve
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Installation Instructions and Owner's Manual