Desa - PHP Heat Wagon LVF90A Service Manual

Troubleshooting, Repair Procedures
Start by visually checking all parts. (Cleaning the heater will help in uncov-
ering trouble spots.) Make sure all parts are present.
Power Cord. Check power cord for continuity and shorts (with ohm meter).
Make sure cord is equipped with a grounded plug.
Electrical Connections. Make sure all connections are in the proper position
and are connected tight.
Check for Spark at Plug or Glow in Glowbar
No Spark/Or Glow Observed
1. Check Spark Plug for
proper gap
2. Defective Transformer
Electronic Igniter
A. Ignition Transformer Test
3. Cracked Spark Plug or Glowbar
A. Resistance Test
B. Thump Test
46

Desa

® International
OBSERVED FAULT
Motor Starts - Unit will not ignite
Spark/Or Glow is Observed
4. Check for Proper
Pump Pressure
5. Check for restricted
Fuel Flow Due To:
A. Seal Leak
B. Filter Blocked
C. Restriction in
Nozzle of Burner Head
D.Fuel Filter Restriction