® VDVF36P and VDVF36ST Series
TROUBLESHOOTING
Note: For additional help, visit DESA International’s Technical Service web site at www.desatech.com.
Note: Before troubleshooting the system, make sure the gas
WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.
Note: All troubleshooting items are listed in order of operation.
CAUTION: Never use a wire, needle, or similar object to clean pilot. This can damage pilot unit.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
Pilot will not light | 1. | No gas supply, or | 1. | Check to see if you have gas supply |
| 2. | Air in gas line | 2. | Hold control valve in the PILOT position |
|
|
|
| for 2 to 3 minutes to purge air. If you smell |
|
|
|
| gas stop and wait for a few minutes before |
|
|
|
| trying to light the fireplace |
| 3. | Construction debris clogging pilot orifice | 3. | Remove debris and dirt, inspect and |
|
|
|
| clean any other possible obstructions |
| 4. | Low gas pressure | 4. | Contact your gas supplier |
| 5. | Control valve knob is not on the PILOT | 5. | Refer to section on pilot lighting |
|
| position |
|
|
| 6. | Kinked pilot line | 6. | Have a qualified technician replace pi- |
|
|
|
| lot line |
| 7. | Bad valve | 7. | Replace control valve (see Replacement |
|
|
|
| Parts, page 23) |
| 8. | Bad thermocouple or loose connection | 8. | Tighten thermocouple or replace |
|
|
|
|
|
No gas to burner, although wall switch and | 1. | Wall switch wires defective | 1. | Check electrical connections |
valve are set to the ON position |
|
|
|
|
|
|
|
|
|
Frequent pilot outage | 1. Pilot flame may be too low, causing |
| safety pilot to “drop out” |
1.Clean and adjust pilot flame for maximum flame impingement on thermopile
Burner goes off after a short time | 1. Venting recirculation problem | 1. Have a qualified technician check vent- |
|
| ing system for leaks or obstructions. |
|
| Have a qualified technician measure the |
|
| pilot’s millivoltage |
www.desatech.com | Continued |
|
|
24 | 105706 |
