Frequently Asked Questions
WHAT IS THE LIKELY ISSUE IF WHILE YOUR HEATER IS RUNNING, YOU:
Hear a Popping Sound
You may have a distorted fuel spray pattern due to:
-low fuel pressure or
-fuel contamination at the nozzle.
Or may be ignition problems such as:
-a weakening coil or
-improper spark gap or
-failing spark plug.
See Excessive Soot Trail Aft of Exhaust Pipe
If the heater seems to be running properly on the ground, then you may have a fuel
If chugging, it may be a
-contaminated fuel nozzle or
-a weak or faulty ignition.
Why am I only getting low heat output from the heater?
You may have an improperly set cycling switch.
Or have a faulty duct switch.
Or a fuel pump supplying low fuel pressure.
Or a failing regulator.
What is the proper way of testing fuel pressure to get a true reading?
"T" in a fuel pressure gauge between the fuel source and the heater's solenoid.
Check the PSIG while the heater is running/burning. The solenoid must be open to
determine accurate pressure.