Desa CGP20B User Manual download pdf (Page 14)

14

104412

VENT-FREE PROPANE/LP GAS HEATER

BLUE-FLAME

TROUBLESHOOTING

WARNING: Turn off and

unplug heater and let cool be-

fore 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 PROBLEM

When ignitor button is pressed, there is no

spark at ODS/pilot

When ignitor button is pressed, there is

spark at ODS/pilot but no ignition

ODS/pilot lights but flame goes out when

control knob is released

Burner does not light after ODS/pilot is lit

POSSIBLE CAUSE

1. Ignitor electrode positioned wrong

2. Ignitor electrode broken

3. Ignitor electrode not connected to igni-

tor cable

4. Ignitor cable pinched or wet

5. Broken ignitor cable

6. Bad piezo ignitor

1. Gas supply turned off or equipment

shutoff valve closed

2. Control knob not in PILOT position

3. Control knob not pressed in while in

PILOT position

4. Air in gas lines when installed

5. Depleted gas supply

6. ODS/pilot is clogged

7. Gas regulator setting is not correct

1. Control knob not fully pressed in

2. Control knob not pressed in long enough

3. Equipment shutoff valve not fully open

4. Thermocouple connection loose at con-

trol valve

5. Pilot flame not touching thermocouple,

which allows thermocouple to cool,

causing pilot flame to go out. This prob-

lem could be caused by one or both of

the following:

A) Low gas pressure

B) Dirty or partially clogged ODS/pilot

6. Thermocouple damaged

7. Control valve damaged

1. Burner orifice is clogged

2. Burner orifice diameter is too small

3. Inlet gas pressure is too low

REMEDY

1. Replace ignitor

2. Replace ignitor

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 piezo ignitor

1. Turn on gas supply or open equipment

shutoff valve

2. Turn control knob to PILOT position

3. Press in control knob while in PILOT

position

4. Continue holding down control knob.

Repeat igniting operation until air is re-

moved

5. Contact local propane/LP gas company

6. Clean ODS/pilot (see Cleaning and

Maintenance, page 13) or replace ODS/

pilot assembly

7. Replace gas regulator

1. Press in control knob fully

2. After ODS/pilot lights, keep control

knob pressed in 30 seconds

3. Fully open equipment shutoff valve

4. Hand tighten until snug, then tighten 1/4

turn more

5. A) Contact local propane/LP gas company

B) Clean ODS/pilot (see Cleaning and

Maintenance, page 13) or replace ODS/

pilot assembly

6. Replace thermocouple

7. Replace control valve

1. Clean burner (see Cleaning and Mainte-

nance, page 13) or replace burner orifice

2. Replace burner orifice

3. Contact local propane/LP gas company

Note:

For additional help, visit DESA

International’s technical service web site

at www.desatech.com.

Note:

All troubleshooting items are listed in

order of operation.

www.desatech.com

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