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TROUBLESHOOTING TECHNICAL SERVICE

TROUBLESHOOTING

You may have further questions about this heater. If so, contact DESA International’s Technical Service Department at 1-866-672-6040 or visit our web site at www.desatech.com.

WARNING: Never attempt to service heater while it is connected to propane/LP supply, operating, or hot. Severe burns can occur.

SYMPTOM

POSSIBLE CAUSE

REMEDY

Burner fails to light

1.

Propane/LP supply valve closed on

 

 

propane/LP cylinder

 

2.

Blockage in burner/orifice elbow/hose and

 

 

regulator assembly

 

3.

Piezo ignition system not sparking

1.Open propane/LP supply valve slowly

2.Clean burner/replace orifice elbow/hose and regulator assembly

3.Verify ignitor electrode gap is .20". Check wire lead for damage. Replace piezo ignitor and/or ignitor electrode as necessary

Burner lights but goes out

1.

Not enough warm-up time

1.

Relight, hold automatic control valve button in

when automatic control

 

 

 

30 seconds

valve button is released

2.

Low gas pressure

2.

Check propane/LP cylinder for proper gas supply

 

3.

Thermocouple loose or needs to be replaced

3.

Tighten connection or replace thermocouple

 

4.

Automatic control valve needs to be replaced

4.

Replace automatic control valve assembly

 

 

 

 

 

Maximum burn rate is low

1.

Low gas pressure

1.

Check gas supply; check regulator output

 

2.

Low fuel supply

2.

Consult propane/LP gas supplier

 

3.

Restriction in burner/orifice elbow/hose and

3.

Clean burner/replace orifice elbow/hose and

 

 

regulator assembly

 

regulator assembly

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-866-672-6040.

You can also visit DESA International’s technical service web site at www.desatech.com.

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Desa 28BN installation manual Troubleshooting, Technical Service

28BN specifications

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