High Limit Thermostat - GE Profile DPVH890EJ Technical Service Manual

High Limit Thermostat

On electric models, the high limit thermostat is
located on the top right area of the heater housing.
On gas models, the high limit thermostat is located
on the upper right side of the diffuser. The high limit
thermostat monitors incoming air temperature.
If the thermostat reaches a temperature beyond its
maximum temperature rating, it will trip and disable
power to the elements or burner assembly.
For the electric models, the high limit thermostat
opens at 315°F (157°C) and will automatically reset
at 250°F (121°C).
For the gas model, the open temperature is 180°F
(82°C) and the close temperature is 165°F (74°C).
To remove the high limit thermostat:
1. Remove the drum. (See
2. Disconnect the 2 wires from the high limit
thermostat.
3. Remove the Phillips-head screw that attaches
the high limit thermostat to the heater assembly
or diffuser.
4. Slide the thermostat from the heater assembly
or diffuser.
High Limit Thermostat
Electric Model Shown
.)
Drum
– 31 –
Outlet Control Thermistor
The outlet control thermistor is located on the lower
rear area of the blower housing. It is below the
outlet control backup thermostat and the rack dry
thermostat. The outlet control thermistor measures
outgoing air temperature and provides temperature
change information to the power board. The outlet
control thermistor has the same resistance values
as the inlet control thermistor. (See
.)
Thermistor
Operation of the outlet control thermistor can be
checked by using the Outlet Thermistor test in
service test mode. (See
Service Test Mode
Specifi c failures associated with the outlet control
thermistor can initiate error codes E3 and E5. (See
.)
Service Test Mode
To remove the outlet control thermistor:
1. Remove the drum. (See
2. Lift the right side of the vapor shield and
disconnect the 2 wires from the outlet control
thermistor.
3. Remove the 2 Phillips-head screws that attach
the outlet control thermistor to the blower
housing.
Electric Model Shown
Inlet Control
.)
.)
Drum
Outlet Control Thermistor