TROUBLE-

SHOOTING

Note: All troubleshooting items are listed in order of operation.

!WARNING

Turn off 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.

OBSERVED

POSSIBLE

 

 

PROBLEM

CAUSE

REMEDY

 

 

 

 

 

When control knob is

1.

Ignitor electrode posi-

1.

Replace ignitor

pressed in and turned

 

tioned wrong

 

 

to the PILOT/IGN po-

2.

Ignitor electrode broken

2.

Replace ignitor

sition, there is no

3.

Ignitor electrode not con-

3.

Reconnect ignitor cable

spark at ODS/pilot

 

nected to ignitor cable

 

 

 

4.

Ignitor cable pinched or

4.

Free ignitor cable if

 

 

wet

 

pinched by any metal or

 

 

 

 

tubing. Keep ignitor cable

 

 

 

 

dry

 

5.

Broken ignitor cable

5.

Replace ignitor cable

 

6.

Bad piezo ignitor

6.

Replace control valve (pi-

 

 

 

 

ezo is part of control

 

 

 

 

valve)

 

 

 

 

 

When control knob is pressed in and turned to the PILOT/IGN po- sition, there is spark at ODS/pilot but no igni- tion

1.Gas supply turned off or manual shutoff valve closed

2.Control knob not pressed in while being turned to PILOT/IGN position

3.Air in gas lines when in- stalled

4.ODS/pilot is clogged

5.Gas regulator setting is not correct

1.Turn on gas supply or open manual shutoff valve

2.Press in control knob while turning to PILOT/ IGN position

3.Continue holding down control knob. Repeat ig- niting operation until air is removed

4.Clean ODS/pilot (see

C L E A N I N G A N D MAINTENANCE, page

16) or replace ODS/pilot assembly

5.Replace gas regulator

17

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Vanguard Heating VN12, VN6A installation manual Trouble Shooting, Observed Possible Problem Cause Remedy