Desa VF-18P-MHd Water Heater User Manual


 
www.desatech.com
116986-01B 23
TROUBLESHOOTING
Continued

 
 
 

 -

 
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.

1. Battery is not installed. Bat-
tery power is low
2. Bad module
1. Metal expanding while heating
or contracting while cooling
1. Heater burning vapors from
paint, hair spray, glues, clean-
ers, chemicals, new carpet,
etc. (See IMPORTANT state-
ment above)
2. Low fuel supply (propane/LP
only)
3. Gas leak.  

1. Not enough fresh air is avail-
able
2. Low line pressure
3. ODS/pilot is partially
clogged
4. Thermostat on remote is
satised
1. Gas leak.  

2. Control valve or gas control
defective
1. Foreign matter between con-
trol valve and burner
2. Gas leak.  

REMEDY
1. Replace 9-volt batteries in
receiver and remote control
2. Replace module
1. This is common with most heat-
ers. If noise is excessive, contact
qualied service person
1. Open window to ventilate
room. Stop using odor caus-
ing products while heater is
running
2. Rell supply tank (propane/LP
only)
3. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 13)
1. Open window and/or door for
ventilation
2. Contact local natural or pro-
pane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 19)
4. Adjust temperature
1. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 13)
2. Replace control valve or gas
control
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 13)

Remote does not function
Heater produces a clicking/tick-
ing noise just after burner is lit
or shut off
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