Mr. Heater MHVFRD10NG Operating Instructions And Owner's Manual page 13

OBSERVED SYMPTOM
White powder residue forming within
burner box or on adjacent walls or
furniture
Heater produces unwanted odors.
Heater shuts off in use (ODS operates)
Gas odor even when control knob is in
OFF position
Gas odor during combustion
Heater produces a clicking/ticking noise
just after burner is lit or shut off
Moisture/condensation noticed on
windows
Unvented Natural Gas Fired Room Heater
POSSIBLE CAUSE
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.
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See WARNING statement at top of
page
2. Control valve is defective
1. Foreign matter between control valve and
burner
2. Gas leak. See WARNING statement at top of
page
1. Metal expanding while heating or contracting
while cooling
1. Not enough combustion/ventilation air
13
REMEDY
1. Turn heater off when using furniture polish,
wax, carpet cleaner or similar products.
1. Ventilate room. Stop using odor-causing prod-
ucts while heater is running.
2. Locate and correct all leaks (see Checking
Gas Connections, page 9)
1. Open window and/or door for ventilation
2. Contact local gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 11)
1. Locate and correct all leaks (see Checking
Gas Connections, page 9)
2. Replace control valve
1. Take apart gas tubing and remove foreign
matter
2. Locate and correct all leaks (see Checking
Gas Connections, page 9)
1. This is common with most heaters. If noise is
excessive, contact qualifi ed service person
1. Refer to Fresh Air for Combustion and
Ventilation page 3 through 5.
Installation Instructions and Owner's Manual