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TROUBLESHOOTING

TROUBLESHOOTING

WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.

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

CAUTION: Never use a wire, needle or similar object to clean pilot. This can damage pilot unit.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

When ignitor button is pressed, there is no

1.

Ignitor electrode not connected to ignitor

1.

Reconnect ignitor cable

spark at pilot

 

cable

 

 

 

2.

Ignitor cable pinched or wet

2.

Free ignitor cable if pinched by any

 

 

 

 

metal or tubing. Keep ignitor cable dry

 

3.

Piezo ignitor nut is loose

3.

Tighten nut holding piezo ignitor. Nut is

 

 

 

 

located behind the mounting bracket

 

4.

Broken ignitor cable

4.

Replace ignitor cable

 

5.

Bad piezo ignitor

5.

Replace piezo ignitor

 

6.

Ignitor electrode broken

6.

Replace pilot assembly

 

7.

Ignitor electrode positioned wrong

7.

Tighten electrode. Replace if necessary

 

 

 

 

 

When ignitor button is pressed, there is spark

1.

Gas supply turned off or equipment

1.

Turn on gas supply or open equipment

at pilot but no ignition

 

shutoff valve closed

 

shutoff valve

 

2.

Gas control knob not in PILOT position

2.

Turn gas control knob to PILOT position

 

3.

Gas control knob not pressed in while in

3.

Press in gas control knob while in PILOT

 

 

PILOT position

 

position

 

4.

Air in gas lines when installed

4.

Continue holding down control knob.

 

 

 

 

Repeat igniting operation until air is

 

 

 

 

removed

 

5. Depleted gas supply (propane/LP models

5. Contact local propane/LP gas company

 

 

only)

6.

Cleanpilot(seeCleaning and Maintenance,

 

6.

Pilot is clogged

 

 

 

 

page 27) or replace pilot assembly

 

7.

Gas regulator setting is not correct

7.

Replace gas regulator

 

 

 

 

 

Pilot lights but flame goes out when control

1.

Gas control knob not fully pressed in

1.

Press in gas control knob fully

knob is released

2.

Gas control knob not pressed in long

2.

After pilot lights, keep gas control knob

 

 

enough

 

pressed in 30 seconds

 

3.

Equipment shutoff valve not fully

3.

Fully open equipment shutoff valve

 

 

open

 

 

 

4.

Pilot flame not touching thermocouple,

4.

A) Contact local natural or propane/LP

 

 

which allows thermocouple to cool,

 

gas company

 

 

causing pilot flame to go out. This prob-

 

B) Clean pilot (see Cleaning and

 

 

lem could be caused by one or both of

 

Maintenance, page 27) or replace pilot

 

 

the following:

 

assembly

 

 

A) Low gas pressure

 

 

 

 

B) Dirty or partially clogged pilot

 

 

 

5.

Thermocouple connection loose at con-

5.

Hand tighten until snug, then tighten

 

 

trol valve

 

1/4 turn more

 

6.

Thermocouple damaged

6.

Replace pilot assembly

 

7.

Control valve damaged

7.

Replace control valve

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Page 28
Image 28
Desa VC42P SERIES, VC42N SERIES installation manual Troubleshooting, Observed Problem Possible Cause Remedy

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