Enerco MHVFB10LP Troubleshooting CON’T, Observed Symptom Possible Cause Remedy

TROUBLESHOOTING CON’T

OBSERVED SYMPTOM		POSSIBLE CAUSE		REMEDY
Burner backfiring during	1.	Burner orifice is clogged or damaged	1.	Clean burner orifice (see Cleaning and
operation				Maintenance on page 13), or replace
	2.	Burner damaged		burner orifice
			2.	Replace burner
	3. Gas regulator defective		3.	Replace gas regulator
Slight smoke or odor during	1. Residues from manufacturing process		1.	Problem will stop after a few hours of
initial operation			operation
Heater produces a whistling	1. Turning control knob to HI position when		1.	Turn control knob to LO position and let
noise when burner is lit		burner is cold		warm up for a minute.
	2. Air in gas line		2. Operate buner until air is removed from
				line have gas line checked by local gas
	3. Air passageways on heater blocked			company.
			3.	Observe minimum installation
				clearances(see Figure 4 page6)
	4. Dirty or partially clogged burner orifice.		4. Clean burner orifice (see Cleaning and
				Maintenance on page 13), or replace
				burner orifice.
White powder residue forming	1. When heated, vapors from furniture polis,		1.	Turn heater off when using furniture
within burner box or on		wax, carpe cleaners, etc., turn into white		polish,wax, carpet cleaner or similar
adjacent walls or furniture		powder residue		products.

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 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		POSSIBLE CAUSE		REMEDY
Heater produces unwanted	1. Heater burning vapors from paint, hair		1.	Ventilate room. Stop using odor-causing
		spray, glues, etc. See IMPORTANT		products while heater is running.
odors.		statement above
	2.	Gas leak. See WARNING statement at	2.	Locate and correct all leaks (see Checking
		top of page.		Gas Connections, page 8)
Heater shuts off in use (ODS	1.	Not enough fresh air is available	1.	Open window and/or door for ventilation
operates)	2.	Low line pressure	2.	Contact local gas company
	3.	ODS/pilot is partially clogged	3.	Clean ODS/pilot (see Cleaning and
				Maintenance, page 11)
Gas odor even when control	1.	Gas leak. See WARNING statement at	1.	Locate and correct all leaks (see Checking
		top of page		Gas Connections, page 8)
knob is in OFF position
	2.	Control valve is defective	2.	Replace control valve
	1.	Foreign matter between control valve and	1.	Take apart gas tubing and remove foreign
Gas odor during combustion		burner		matter
	2.	Gas leak. See WARNING statement at	2.	Locate and correct all leaks (see Check-
		top of page		ing Gas Connections, page 8)
Heater produces a cliking/	1.	Metal expanding while heating or contract-	1.	This is common with most heaters. If noise
ticking noise just after burner		ing while cooling		is excessive, contact qualified service
is lit or shut off				person
Moisture/condensation noticed	1. Not enough combustion/venitlation air		1.	Refer to Fresh Air of Combustion and
on windows				Ventilation page 3 through 5.

13Installation instructions and Owner’s Manual