Air Proving Switch With Paddle; To Remove Control Box And Wire Harness From Heater - L.B. White AW250 Owner's Manual And Instructions

AIR PROVING SWITCH WITH PADDLE

1. Open the case access panel on the control box end of
the heater.
2. Remove the two (2) sheet metal screws holding the
switch with bracket to blower housing. Remove the
assembly by turning the switch assembly 90°so the
paddle on the switch arm can be pulled through the
oblong hole on side of fan housing.
3. Disconnect the leads from the air proving switch.
4. To replace the switch, reverse the above procedure.
The replacement switch will be pre-assembled to its
mounting bracket.

TO REMOVE CONTROL BOX AND WIRE HARNESS FROM HEATER

1. Open the motor access panel.
2. Disconnect flame sensor lead and high voltage
ignition lead from ignition control and route these
back through the rubber grommet in the back of the
control box.
3. Trace and disconnect all remaining electrical leads
which exit the back of the control box from the
components or the areas to which these leads are
connected.
4. Remove liquid tight connector nut and sealing washer
on inside of control box. Pull connector with leads
from back of control box.
5. Remove the three (3) screws on each side of the
control panel and remove the control box from the
heater.
6. To assemble, reverse above procedure.
14
FIG. 8
SWITCH W/PADDLE
HOUSING SIDE
LEADS
FIG. 9
CONTROL
PANEL
NUT, LIQUID TIGHT
WASHER, SEALING
NUTS
PADDLE
OBLONG HOLE
PANEL
REMOVE 3 SCREWS
(EACH SIDE)
HARNESS