TROUBLE-

TROUBLE-

WARNING

SHOOTING

Turn off and unplug heater and let cool before servicing.

Note: All troubleshooting

Unless you need gas supply for testing, shut off manual

shutoff valve before servicing. Only a qualified service

items are listed in order of

person should service and repair heater and venting

operation.

system.

 

 

 

 

 

 

 

 

CAUTION

 

 

 

 

 

 

 

 

 

Never use a wire, needle, or similar object to clean pilot.

 

 

 

 

 

 

 

This can damage pilot.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OBSERVED

POSSIBLE

 

 

 

 

 

 

 

PROBLEM

CAUSE

REMEDY

 

 

 

 

 

 

 

 

 

 

 

 

When ignitor button is

1.

Incorrect spark gap.

1.

Adjust spark gap to 1/16".

 

 

pressed, there is no

2.

Ignitor electrode posi-

2.

Replace ignitor.

 

 

spark at pilot.

 

tioned wrong.

 

 

 

 

 

 

 

 

 

 

3.

Ignitor electrode broken.

3.

Replace ignitor.

 

 

 

 

 

4.

Ignitor electrode not con-

4.

Reconnect ignitor cable.

 

 

 

 

 

 

nected to ignitor cable.

 

 

 

 

 

 

 

 

 

 

5.

Ignitor cable pinched or

5.

Free ignitor cable if

 

 

 

 

 

 

wet.

 

pinched by any metal or

 

 

 

 

 

 

 

 

tubing. Keep ignitor

 

 

 

 

 

 

 

 

cable dry.

 

 

 

 

 

6.

Piezo ignitor nut is loose.

6.

Tighten nut holding piezo

 

 

 

 

 

 

 

 

ignitor to heater cabinet.

 

 

 

 

 

 

 

 

Nut is located inside

 

 

 

 

 

 

 

 

heater cabinet at top.

 

 

 

 

 

7.

Broken or frayed ignitor

7.

Replace ignitor cable.

 

 

 

 

 

 

cable.

 

 

 

 

 

 

 

 

 

 

8.

Loose ignitor cable.

8.

Reconnect ignitor cable.

 

 

 

 

 

9.

Bad piezo ignitor.

9.

Replace piezo ignitor.

 

 

 

 

 

 

 

 

 

 

When ignitor button is

1. Gas supply turned off or

1.

Turn on gas supply or

 

 

pressed, there is spark

 

manual shutoff valve

 

open manual shutoff

 

 

at pilot but no igni-

 

closed.

 

valve.

 

 

tion.

2.

Control knob not in PI-

2.

Turn control knob to PI-

 

 

 

 

 

 

LOT position.

 

LOT position.

 

 

 

 

 

3.

Control knob not pressed

3.

Press in control knob

 

 

 

 

 

 

in while in PILOT posi-

 

while in PILOT position.

 

 

 

 

 

 

tion.

 

 

 

 

 

 

 

 

 

 

4.

Air in gas lines when in-

4.

Continue holding down

 

 

 

 

 

 

stalled.

 

control knob. Repeat ig-

 

 

 

 

 

 

 

 

niting operation until air

 

 

 

 

 

 

 

 

is removed.

 

 

 

 

 

5.

Pilot is clogged.

5.

Clean pilot (see Cleaning

 

 

 

 

 

 

 

 

and Maintenance, page

 

 

 

 

 

 

 

 

25) or replace pilot as-

 

 

 

 

 

 

 

 

sembly.

 

 

 

 

 

6.

Gas regulator setting is

6.

Replace control valve.

 

 

 

 

 

 

not correct.

 

 

 

 

 

26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 26
Desa GVB35N, GVB50N installation manual Trouble, Shooting, and Maintenance, page