Troubleshooting

Electronic IGNITION

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 pilot. This can damage pilot unit.

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

The two most common causes of a malfunctioning gas appliance are:

1.Loose wiring connections

2.Construction debris clogging the pilot and/or gas control valve filter

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

 

Ignitor will not spark or pilot

1.

No gas supply, or shutoff valve

1.

Check to see if you have gas

will not light

 

is OFF

 

supply and that equipment

 

2.

Air in gas line

2.

shutoff valve is opened

 

Repeat lighting procedure sev-

 

 

 

 

eral times to purge all air out of

 

 

 

 

lines. If after repeated attempts

 

 

 

 

appliance does not light, call for

 

3.

Construction debris clogging

3.

qualified service and repair

 

Remove debris and dirt, and

 

 

pilot orifice

 

inspect and clean any other

 

4.

Low gas pressure

4.

possible obstructions

 

Contact your gas supplier to

 

5.

Kinked pilot line

5.

check pressure

 

Have a qualified technician

 

6.

Control valve is not opening

6.

replace pilot line

 

Replace control valve (Refer to

 

7.

No power to unit or the igni-

7.

Replacement Parts, page 44)

 

Check that main power is on

 

 

tion module

 

and that wire connections are

 

 

 

 

made correctly to the ignition

 

 

 

 

model (see Wiring Diagram,

 

 

 

 

page 24). Check for 24 VAC

 

 

 

 

at the secondary side of the

 

 

 

 

transformer. If 24 VAC is pres-

 

 

 

 

ent, and the module does not

 

 

 

 

operate, have the module

 

 

 

 

replaced otherwise have the

 

 

 

 

transformer replaced.

 

Pilot will not stay lit

1.

Loose wiring on ignitor wire

1.

Check wiring connection.

 

 

to ignition module and/or poor

 

Refer to wiring diagram (see

 

 

ground to ignition module

 

Wiring Diagram, page 24)

 

 

 

 

and/or check ground wire to

 

2.

Pilot flame too low to sense

2.

ignition module

 

Clean and adjust pilot burner

 

 

 

 

and check gas supply and inlet

pressure to unit Note: Have a qualified technician replace pilot assembly if broken or corroded

42

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116035-01E

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Desa (V)CD36TNE, (V)CD36RPE, (V)CD36TPE, (V)CD36RNE installation manual Electronic Ignition
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