Hurricane SCH25, Service And Troubleshooting Manual

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inlet of the fuel solenoid could have been damaged. To
check this fuel line for leaks, do the following:
Turn off the service switch and allow the heater to
completely power down (this will take 2 minutes).
1.
IMPORTANT: Disconnect the main power (12VDC)
from the heater. Disconnecting the 12VDC power
ensures that the heater will not attempt to fire if it is
accidentally turned ON. If the heater were to attempt to
fire with the front cover off, it will project open flame
towards the user.
2. Remove the screws on the front cover and remove the
cover.
3. Inspect the fuel line from the regulator to the fuel
solenoid for leaks. The hose clamps must be secured on
the outlet of the fuel regulator and on the inlet of the
fuel solenoid.
4. Also, if the fuel solenoid was replaced, check for proper
sealant on the threads. Proceed to Q2.
IF NO:
The problem is not with the heater. There may be a cut in
the fuel line running from the fuel tank to the fuel inlet of
the heater, or the hose clamps may not be secured in place.
Q2: Is the fuel line leaking or does the fuel solenoid not have proper
sealant on the threads?
IF YES:
• If the fuel line is leaking, replace the fuel line with 1/4”
I.D. diesel approved fuel line.
• If the fuel solenoid does not have sealant on the
threads, refer to 5.3.1 to put on the appropriate sealant.
IF NO:
Refer to the next section (continuous sputtering).
The heater sputters continuously and eventually flames out.
The sputtering effect is due to air in the fuel system. When the burner
chamber is hot, this sputtering effect can cause the heater to backfire.
Continuous sputtering is commonly caused by a damaged O-ring in the
fuel nozzle. To check the nozzle, refer to 5.3.3. Proceed to Q1.
Q1: Is the O-ring in the fuel nozzle damaged?
IF YES:
Replace the fuel nozzle. To replace the fuel nozzle, refer to
5.3.3.