Technical Service; Service Hints - Vanguard VMH2800TNC Owner's Operation And Installation Manual

TROUBLE
SHOOTING
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. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
OBSERVED PROBLEM
Heater produces a clicking/ticking 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
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or Trouble Shooting.
If so, contact DESA International's Techni-
cal Service Department at 1-800-323-5190.
103506
POSSIBLE CAUSE
1. Metal expanding while heating or
contracting while cooling
1. Heater burning vapors from paint, hair
spray, glues, etc. (see
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 defective
1. Foreign matter between control valve
and burner
2. Gas leak.
See Warning statement at
top of page

SERVICE HINTS

When gas pressure is too low
• pilot will not stay lit
• burner(s) will have delayed ignition
• heater will not produce specified heat
19
OWNER'S MANUAL
IMPORTANT:
purities in air exist may create odors. Clean-
ing 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.
REMEDY
1. This is common with most heaters. If
noise is excessive, contact qualified
service person
1. Ventilate room. Stop using odor causing
IMPORTANT products while heater is running
2. Locate and correct all leaks (see
Checking Gas Connections, page 13)
1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 16)
1. Locate and correct all leaks (see
Checking Gas Connections, page 13)
2. Replace control valve
1. Take apart gas tubing and remove
foreign matter
2. Locate and correct all leaks (see
Checking Gas Connections, page 13)
When gas quality is bad
• pilot will not stay lit
• burner(s) will produce flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
natural gas supplier.
Operating heater where im-