TROUBLESHOOTING

WARNING: Never service heater while it is plugged in, operating or hot. Severe burns and electrical shock can occur. Only a qualified service person should service and repair heater.

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

Motor does not start when heater

1. No power or low voltage at

1.

A) Check condition of power

is plugged in and thermostat set-

 

heater due to:

 

cord or extension cord. Repair

ting is higher than surrounding

 

A) Damaged power cord or

 

or replace if damaged

air temperature

 

extension cord

 

B) Use extension cord with

 

 

B) Wrong size extension cord

 

proper wire size (see To Start

 

 

C) Heater plugged into outlet

 

Heater, page 4)

 

 

with voltage lower than 120

 

C) Make sure heater is plugged

 

 

volt

 

into 120 volt/60 hertz outlet

 

2.

Loose electrical connections

2.

Check connections. Tighten if

 

3.

Motor overload protector

 

loose

 

3.

A) See Fan Blades and Air

 

 

tripped due to:

 

Deflectors, page 10

 

 

A) Dirty fan

 

B) Remove debris from fan

 

 

B) Debris pulled into fan area

 

and fan guard area

 

 

by fan

 

C) Turn fan by hand. If fan is

 

 

C) Binding pump

 

hard to turn, see Pump, page

 

 

D) Low voltage

 

12

 

 

 

 

D) See steps B and C under

 

 

 

 

item 1 above

 

 

 

 

Note: Be sure to reset motor

 

 

 

 

overload protector by pressing

 

 

 

 

reset button on top of motor

 

4.

Flame-out control not reset

4.

Press and release flame-out

 

 

 

 

control reset button. See

 

 

 

 

Figure 4, page 4 for button

 

 

 

 

location

 

5.

Damaged flame-out control

5.

Replace flame-out control

 

6.

Damaged power relay

6.

Replace power relay

 

7.

Damaged thermostat

7.

Replace thermostat

 

8.

Binding pump

8.

Turn fan by hand. If fan is hard

 

 

 

 

to turn, see Pump, page 12

110098-01F

www.desatech.com

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Desa KEROSENE HIGH PRESSURE PORTABLE FORCED AIR HEATERS Troubleshooting, Observed Problem Possible Cause Remedy

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