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WARNING: Never service heater while it is plugged in, connected
to propane supply, operating or hot. Severe burns and electrical
shock can occur.
OBSERVED FAULT
Fan does not turn when heater
is plugged in
Heater will not ignite
Heater shuts down while
running
10

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POSSIBLE CAUSE
1. No electrical power to heater
2. Fan hitting inside of heater
shell
3. Fan blades bent
4. Defective motor
1. User did not follow instal-
lation or operation instruc-
tions properly
2. No spark at ignitor. To test
for spark, follow step 8 un-
der Ignitor, page 9. If you
see spark at ignitor, have
heater serviced by qualified
service person. If no spark
seen:
A) Loose or disconnected
ignitor wire
B) Wrong spark gap
C) Piezo ignitor loose
D) Bad ignitor electrode
1. High surrounding air tem-
perature causing thermal
limit device to shut down
heater
2. Restricted air flow
3. Damaged fan
4. Excessive dust or debris in
surrounding area
WARNING: Use only in areas
free of high dust content.
www.desatech.com
REMEDy
1. Check voltage to electrical
outlet. If voltage is good,
check heater power cord
for breaks
2. Adjust motor/fan guard to
keep fan from hitting inside
of heater shell. Bend fan
guard if necessary
3. Replace fan. See Fan,
page 8
4. Replace motor. See Motor,
page 7
1. Repeat installation and
operation instructions. See
Installation and Operation,
page 5
2. A) Check ignitor wire. Tight-
en or reattach loose ignitor
wire. See Figure 11, page
8 for ignitor wire location
B) Set gap between ignitor
electrode and target plate
to 0.17" (0.43 cm)
C) Tighten nut holding piezo
ignitor to base of heater
D) Replace ignitor elec-
trode. See Ignitor, page 8
1. This can happen when run-
ning heater in temperatures
above 85° F (29.44° C). Run
heater in cooler tempera-
tures
2 Check heater inlet and out-
let. Remove any obstruc-
tions
3. Replace fan. See Fan,
page 8
4. Clean heater. See Mainte-
nance, page 7
113855-01D

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