Tradesman Construction Heaters
Owner’s Manual • Tradesman
19
MAINTENANCE
1. Using a small wire brush, reach down the barrel of
the heater and brush the igniter electrode. Ensure
buildup is removed.
2. Verify igniter gap of the igniter electrode. Gap
should be 3/16 in. See Fig. 19.
FIG. 19
Thermostat
Tradesman 170:
■ Remove the base bottom. Slide the thermostat
bulb through the cable tie. See Fig. 20.
All Tradesman 400 Heaters:
■ Remove a side panel and the fan guard. Open the
bulb rention clip to remove thermostat bulb. See
Fig. 21. Guide the thermostat bulb through the
bushing.
2. Remove knob and thermostat mounting screws
and disconnect its wiring. See Fig. 22.
FIG. 20
FIG. 21
FIG. 22
Ignition Control
1. Disconnect the LED wire harness (if applicable) from
the circuit board.
2. Disconnect the ignition cable and remove the nuts
securing the control to the side of the heater’s base.
See Fig. 23.
3. When replacing, use care to prevent damage to the
controller’s components.
FIG. 23
CLIP
BUSHING
SCREWS
SCREWS
IGNITION CABLE
NUT
LED WIRE
HARNESS
3/16 IN. / 4.7 mm
BULB
THERMOSTAT
