Lanair Products, LLC
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Lanair Waste-Oil Heater - Pump Motor & Coupler Troubleshooting
Pump Motor and Coupler Troubleshooting a Lanair Waste Oil Heater
In this video we will discuss how to troubleshoot the fuel-pump assembly on a Lanair waste-oil heater.
If you are trying to diagnose an issue with your heater’s fuel-delivery system, this video should help.
Safety Precautions & Prep
It’s important to follow safety guidelines when working on mechanical, plumbing, and electrical equipment. Only allow qualified technicians to work on your system and ensure that the appropriate personal protective equipment and safe practices are used throughout the work.
Before beginning, refer to the product instruction manual and ensure that the unit is properly installed and the fuel-priming and burner-startup procedures have been attempted.
If the system will not successfully prime or deliver fuel continue with this troubleshooting process.
Step One
For safety, set the thermostat to its lowest temperature setting so that it will not attempt to start working at the pump.
Step Two
Remove the cover from the fuel-pump assembly to expose the coupler.
Step Three
Find or make a marking on the coupler to make it easier to confirm changes in its position.
Step Four
Make sure hands and tools are cleared away from the fuel-pump assembly, then establish a call for heat to the unit by setting the thermostat to its maximum temperature setting. If the red light on the burner’s primary control is indicating that the unit is locked out, you will need to press the reset button on the top of the primary control to reset the burner. The unit should now attempt to start operating.
Step Five
Observe the fuel-pump assembly’s coupler, looking for rotation.
If the coupler is consistently rotating without slipping or emitting unusual noise, the issue is likely with the pump itself.
Step Six
Attempt to bleed the pump of air that may be binding it.
Step Seven
If this does not resolve the issue, refer to the product manual for how to service the pump’s internal strainer or contact Lanair technical support for further assistance.
Step Eight
If the coupler does not rotate when there is a call for heat, check the shaft of the motor for rotation.
Step Nine
If the motor shaft does not rotate, further troubleshooting is required. Contact Lanair technical support for further assistance.
Step Ten
If the motor shaft rotates but the coupler does not, inspect the coupler for damage or stripping.
Step Eleven
If the coupler is damaged, replace it with a new part and make sure that the assembly’s fit-up and alignment allow it to work without damaging or prematurely wearing the new coupler.
Contact Lanair by phone or at lanair.com for replacement parts.
Step Twelve
When the motor, coupler, and pump are all working properly, turn the thermostat to its lowest temperature setting again and reattach the cover to the pump assembly.
The fuel pump is now ready to return to normal operation.
