Troubleshooting - Mr. Heater MHVFIH10LPT Operating Instructions 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.
TROUBLESHOOTING
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 re-
mover, cigarette smoke, cements and glues, new carpet or textiles, etc., Crzeate fumes. These fumes may mix with
combustion air and create odors and possible discoloration of walls and ceilings.
OBSERVED SYMPTOM
When ignitor button is pressed in, there is a
spark at the ODS/pilot but no ignition
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during operation
Burner plaque(s) does not glow [Infrared
Only]
Slight smoke or odor during initial operation
Heater produces a whistling noise when
burner is lit
White powder residue forming within burner
box or on adjacent walls or furniture
Heater produces unwanted odors.
Unvented Liquid Propane Fired Room Heater
POSSIBLE CAUSE
1. Control knob not fully pressed in.
2. Control knob not pressed in long enough
3. Equipment shutoff valve not fully open
4. Thermocouple connection loose at control valve
5. 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
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice is clogged
2. Burner orifice diameter to small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Control knob set between locked positions.
3. Inlet gas pressure is too low
1. Residues from manufacturing process
1. Turning control knob to HI position when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice.
1. When heated, vapors from furniture polish, wax, carpet
cleaners, etc., turn into white powder residue
1. Heater burning vapors from paint, hair spray, glues, etc.
See IMPORTANT statement above
2. Gas leak. See WARNING statement at top of page.
12
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob pressed in
for 30 seconds
3. Fully open equipment shutoff valve
4. Hand tighten thermocouple nut until snug, and then
tighten 1/4 turn more.
5. -
a. Contact local gas company
b. Clean ODS/pilot (see Cleaning and Maintenance,
page 11).
6. Replace thermocouple
7. Replace Control valve.
1. Clean burner orifice (see Cleaning and Maintenance
on page 11), or replace burner orifice
2. Replace burner orifice
3. Contact local gas company
1. Clean burner orifice (see Cleaning and Maintenance
on page 11), or replace burner orifice
1. Clean burner orifice (see Cleaning and Maintenance
on page 11), or replace burner orifice
2. Replace burner
3. Replace gas regulator
1. Replace burner
2. Turn control knob until it locks at desired setting.
3. Replace gas regulator
1. Problem will stop after a few hours of operation
1. Turn control knob to LO position and let warm up for
a minute.
2. Operate burner until air is removed from line have
gas line checked by local gas company.
3. Observe minimum installation clearances (see Figure
4 page 6)
4. Clean burner orifice (see Cleaning and Maintenance
on page 11), or replace burner orifice.
1. Turn heater off when using furniture polish, wax,
carpet cleaner or similar products.
1. Ventilate room. Stop using odor-causing products
while heater is running.
2. Locate and correct all leaks (see Checking Gas Con-
nections, page 9)
Installation Instructions and Owner's Manual