www.desatech.com
120942-01E
18
REMEDY
1. Check voltage to electrical
outlet. If voltage is good,
check heater power cord for
breaks
2. Adjust thermostat to higher
setting
3. Wait for ambient temperature
to decrease
4. Replace motor. See
Motor and
Blower Assembly
, page 14
5. Check wiring for loose con-
nections or damage
1. Check gas supply, connec-
tions and hoses
2. Repeat installation and op-
eration instructions. See
Installation
, page 11 and
Operation
, page 12
3.
A) Check ignitor wire. Tighten
or reattach loose ignitor wire.
B) Assure gap between ignitor
electrode and burner deck is
0.10"/0.12" (2.5/3.0 mm). Do
not bend electrode. Doing so
may cause it to break
C) Replace ignitor elec-
trode. See
Replacing Ig
-
nitor
, page 16
D) Replace spark trans-
former. See
Replacing DSI
Control
, page 16
3. Clean tubing
POSSIBlE CAUSE
1. No electrical power to heater
2. Thermostat set too low
3. Ambient temperature is too
high. Thermostat is satis-
fied
4. Defective motor
5. Loose wiring connections
1. No fuel flow
2. User did not follow installa-
tion or operation instructions
properly
3. No spark at ignitor. To test
for spark, follow step 5 under
Replacing Ignitor
, page 16. 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) Bad ignitor electrode
D) Bad spark DSI
3. Air proving switch blocked
ObSERVED FAULT
Fan does not turn when
switch(s) 1 or 2 are pressed
to ON
Heater will not ignite
TroUBLeSHooTing
WARNING: Never service heater while it is plugged in, connected
to propane supply, operating, or hot. Severe burns and electrical
shock can occur.
