When troubleshooting, use soapy water. Find and stop ALL bubbles before you move on! Bubbles mean a loss of air pressure and reduced fuel delivery. These heaters are not
First, this test can be dangerous if you are not familiar with electricity. Don’t attempt if you are not experienced- see a professional! Remove the
The heater will run as long as the control valve is pressed. According to DESA test these parts. NOTE: Not all heaters are equipped with
Excessive odor can be caused by any condition that disrupts the factory specifications regarding Airflow or Fuel flow. A disruption in either will create a condition that
Test a photocell– HSI type heater According to the manufacturer, DESA International: Connect the leads of an ohmmeter to the terminals on the photocell assembly.
Annual Replacement Recommended PP212 Unplug heater Remove upper shell and plastic fan grill(if equipped) Remove fan For kerosene models, disconnect air line, fuel line Disconnect
Test a thermal switch (aka high limit switch) on a DESA brand propane construction heater. The thermal switch is a safety device that will shut the
Take a good look at the above 5/8″ rotor. There are 4 vanes. Each vane is almost perfectly 5/8″ square. Place a straight edge across
Air Output, Air Intake, and Lint Filters Remove upper shell Remove filter end cover screws using 5/16″ nut driver Remove end cover Replace air output
Annual Replacement Recommended PP211 Unplug heater Remove upper shell and plastic fin grill(if equipped) Remove fan(except on 350 or 600 models) Disconnect spark plug wire