Periodic maintenance of your diesel heater is necessary to ensure proper performance and to prevent failures. The Annual Maintenance Kit comes with a replacement filter, replacement burner nozzle, necessary O-rings, and illustrated instructions for a proper Performance Maintenance (PM) of your heater.
Don’t wait until your heater is malfunctioning to perform basic maintenance on it; get in front of potential problems by performing the necessary annual maintenance.
For a more thorough performance maintenance, you may also want to consider purchasing a Fuel Pressure Test Gauge.