
6
use excessive force.
7. Wait five minutes to clear out any gas. Then smell for
gas, including near the floor.
8. If gas can be smelled following the five minute waiting
period in Step 7, follow the instructions on Page 1 of this
manual. If gas can not be smelled, turn the gas control
knob counterclockwise to the On position (Fig-
ure 2). The knob should turn easily. Do not use exces-
sive force.
9. Replace the door on the front of the furnace.
10. Open the manual gas valve external to the furnace.
11. Turn on the electrical power supply to the furnace.
12. Set the room thermostat to the desired temperature.
NOTE: There is an approximate 20 second delay between
thermostat energizing and burner firing.
High Manifold
Regulator
Adjustment
Screw
Inlet Pressure
Tap (Side)
OFF
ON
PM
C
HI
Low Manifold
Regulator
Adjustment
Screw
Gas Control Knob
(Shown In "ON" Position)
Figure 2
White Rodgers Model 36E36
Self Diagnostic Electronic Control Module
Certain furnace models are equipped with a self-diagnostic
electronic control module. If a furnace component is not op-
erating properly, the control module will repeatedly flash a
red light on and off in a factory-programmed sequence, de-
pending on the problem encountered.
If a furnace equipped with a self diagnostic module is not
operating properly, look through the observation window in
the blower access door and make note of the number of
flashes in the sequence. Contact a qualified servicer for fur-
ther information. Do not attempt to troubleshoot the prob-
lem yourself.
Reset After Control Lock-Out
If ignition has not been achieved for any reason after sev-
eral ignition cycles, the electronic control module will lock-
out the furnace. Ignition is no longer attempted. The control
diagnostic light will then repeat a single flash followed by a
pause. When this occurs, it is possible to reset the control
by turning the thermostat setting below room temperature
for one to twenty seconds then returning the setting to the
desired temperature. The control will automatically reset af-
ter two hours. The control may also be reset after a lock-out
by turning off the electrical disconnect switch to the furnace
for one to twenty seconds.
IMPORTANT: If the furnace must be reset frequently to ob-
tain satisfactory operation, a problem exists with your fur-
nace that must be corrected. Contact a qualified servicer.
Turning Off Furnace
1. Set the thermostat to lowest setting.
2. Turn off the electrical power supply to the furnace.
3. Remove the louvered door on the front of the furnace by
lifting up and pulling forward.
4. Turn the gas control knob clockwise to the Off
position (Figure 2). The knob should turn easily by hand.
Do not use excessive force.
5. Close manual gas shut-off valve external to the furnace.
6. Replace the door on the furnace.
Auxiliary Limit Control (Figures 3 & 4)
A secondary limit control is located on the blower deck. Dis-
connect electrical power prior to removing the non-louvered
door to reach the secondary limit control. The control is in
addition to the main limit control and shuts the furnace off in
case of a blower failure. This control is a manual reset con-
trol, which can be reset only once. If the unit goes off on limit
a second time, contact a qualified servicer so the problem
causing the control to open can be corrected.
Figure 3
Upflow Auxiliary Limit Location
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