Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD Bad module Replace module

troubleshooting

Continued

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 your gas supplier from a neighbor’s phone. Fol- low 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. These odors will disappear over time.

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
Remote does not function	1. Battery is not installed. Bat-		1.	Replace 9-volt batteries in
	2.	tery power is low	2.	receiver and remote control
		Bad module		Replace module
Heater produces a clicking/tick-	1. Metal expanding while heating		1.	This is common with most heat-
ing noise just after burner is lit		or contracting while cooling		ers. If noise is excessive, contact
or shut off				qualified service person
Heater produces unwanted	1. Heater burning vapors from		1.	Open window to ventilate
odors		paint, hair spray, glues, clean-		room. Stop using odor caus-
		ers, chemicals, new carpet,		ing products while heater is
		etc. (See IMPORTANT state-		running
	2.	ment above)	2.	Refill supply tank (propane/LP
		Low fuel supply (propane/LP
	3.	only)	3.	only)
		Gas leak. See Warning		Locate and correct all leaks
		statement at top of page		(see Checking Gas Connec-
				tions, page 13)
Heater shuts off in use (ODS	1. Not enough fresh air is avail-		1.	Open window and/or door for
operates)	2.	able	2.	ventilation
		Low line pressure		Contact local natural or pro-
	3.	ODS/pilot is partially	3.	pane/LP gas company
				Clean ODS/pilot (see Cleaning
	4.	clogged	4.	and Maintenance, page 19)
		Thermostat on remote is		Adjust temperature
		satisfied
Gas odor even when control knob	1. Gas leak. See Warning		1.	Locate and correct all leaks
is in OFF position		statement at top of page		(see Checking Gas Connec-
	2.	Control valve or gas control	2.	tions, page 13)
				Replace control valve or gas
		defective		control
Gas odor during combustion	1. Foreign matter between con-		1.	Take apart gas tubing and
	2.	trol valve and burner	2.	remove foreign matter
		Gas leak. See Warning		Locate and correct all leaks
		statement at top of page		(see Checking Gas Connec-
				tions, page 13)

116986-01B www.desatech.com 23