TROUBLESHOOTING

Continued

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

Heater ignites, but flame-out

1. Wrong pump pressure

1.

Adjust pump pressure (see

control shuts off heater after a

 

 

 

Pump Pressure Adjustment

short period of time

 

 

 

sections, page 12)

 

2.

Dirty fuel filters

2.

Clean fuel filters (see Fuel

 

 

 

 

Filters, page 14)

 

3.

Dirt in nozzle

3.

Replace nozzle (see Nozzle,

 

4.

Dirty photocell lens

 

page 11)

 

4.

Clean photocell lens with

 

5.

Open or damaged photocell

 

clean cotton swab

 

5.

Replace photocell

 

6.

Bad flame-out control

6.

Replace flame-out control

 

7.

Damaged fan switch

7.

Replace fan switch

 

 

 

 

Heater burns, but puffs of smoke

1. Wrong pump pressure

1.

Adjust pump pressure (see

can be seen

 

 

 

Pump Pressure Adjustment

Heater does not burn steady

2. A) Heater almost out of fuel

 

sections, page 12)

Heater burns with odor

2.

A) Add fuel to tank

Heater smokes continuously

 

B) Water condensation in fuel

 

B) Check fuel tank for bubbles

 

 

tank

 

of water in bottom. If found,

 

 

C) Wrong fuel

 

remove fuel (see Storing,

 

 

 

 

Transporting or Shipping,

 

 

 

 

page 6). Clean tank and fuel

 

 

 

 

filters (see Fuel Filters, page

 

 

 

 

14). Fill with clean fuel

 

 

 

 

C) Remove wrong fuel (see

 

 

 

 

Storing, Transporting or Ship-

 

 

 

 

ping, page 6). Clean tank and

 

 

 

 

fuel filters (see Fuel Filters,

 

 

 

 

page 14. Fill with correct fuel

 

3.

Dirty fuel filters

3.

Clean fuel filters (see Fuel

 

4.

Air leak in suction system

 

Filters, page 14)

 

4.

Tighten all fuel line connections

 

5.

Dirty nozzle

 

(see Fuel Lines, page 13)

 

5.

Replace nozzle (see Nozzle,

 

6.

Low voltage causing motor to

 

page 11)

 

6.

Check voltage at heater. Volt-

 

 

operate below rated speed

 

age at heater should be not

 

 

 

 

less than 90% of rated voltage

 

 

 

 

(108V minimum for 120V

 

7.

Loose fuel line

 

heaters)

 

 

 

7.

Check and tighten all fuel line

 

 

 

 

connections (see Fuel Lines,

 

 

 

 

page 13)

10

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110098-01G

Page 10
Image 10
Desa Tech HEATERS OWNER'S MANUAL owner manual Pump Pressure Adjustment

Tech HEATERS OWNER'S MANUAL specifications

Desa Tech heaters are renowned for their advanced heating solutions that combine efficiency, safety, and user-friendly features. This owner’s manual serves as a comprehensive guide to the main features, technologies, and characteristics of Desa Tech heaters, ensuring users can maximize their heating experience while maintaining optimal safety and performance.

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