Troubleshooting - Vanguard VN18A Safety Information And Installation Manual

WARNING: Turn off and unplug heater and let cool before servicing.
Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed
in, there is no spark at ODS/
pilot
When ignitor button is pressed
in, there is a spark at ODS/Pilot
but no ignition
18

TROUbLESHOOTING

POSSIBLE CAUSE
1. Ignitor electrode positioned
wrong
2. Ignitor electrode broken
3. Ignitor electrode not con-
nected to ignitor cable
4. Ignitor cable pinched or wet
5. Broken ignitor cable
6. Bad ignitor
7. Battery not installed, battery
power low or battery not in-
stalled correctly
1. Gas supply turned off or equip-
ment shutoff valve closed
2. Control knob not fully pressed
in while pressing ignitor but-
ton
3. Air in gas lines when in-
stalled
4. Depleted gas supply (propane/
LP gas)
5. ODS/pilot is clogged
6. Gas regulator setting is not
correct
7. Control knob is not in pilot
position
www.desatech.com
REMEDY
1. Replace pilot assembly
2. Replace pilot assembly
3. Reconnect ignitor cable
4. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
5. Replace ignitor cable
6. Replace ignitor
7. Install new alkaline battery
in electronic ignitor. Verify
battery is installed correctly
1. Turn on gas supply or open
equipment shutoff valve
2. Turn to PILOT position. Fully
press in control knob while
pressing ignitor button
3. Continue holding down con-
trol knob. Repeat igniting op-
eration until air is removed
4. Contact local propane/LP gas
company
5. Clean ODS/pilot (see Cleaning
and Maintenance, page 17) or
replace ODS/pilot assembly
6. Replace gas regulator
7. Turn control knob to pilot
position
113052-01F