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Troubleshooting
Maintenance
Troubleshooting & Parts
• Switch heater ON at least once monthly for 10 minutes
• Clear combustion air supply and the exhaust system after longer standstill periods.
• Perform an annual preseason tune up:
• Remove and inspect glow pin for wear or deformation. Clean or replace as required.
• If the heater has excessive smoking or carbon build up, disassemble and clean the heater.
• Ensure that the vehicle batteries are maintained
Note
: Batteries have significantly reduced capacity in cold weather
The PHP-52W is equipped with self diagnostic capabilities. In the event of failure, an error code will be
displayed on the operating switch. Refer to the Fault Code Diagnostic Chart for direction. In addition,
consider our basic troubleshooting steps.
Basic Troubleshooting:
• Look for error code on timer and consult Fault Code Diagnostic Chart for direction.
• Ensure sufficient fuel.
• Check wiring & connections for breaks or corrosion
• Check to make sure the voltage going to the heater is not too low or high.
• Check the fuses to make sure they are not burned out.
• Remove power for 5 minutes or via main fuse at the battery, reinstall the fuse and restart.
• Install and test the heater with a new controller.
• Install a new ECU
