Cavity Thermal Cut Out (Tco); Lockout Relay - GE C2S985 Technical Service Manual

Cavity Thermal Cut Out (TCO)

The upper and lower cavity TCOs are located behind
the left side panel. Both oven cavity TCOs are wired
in series between the latching motors and the ERC.
If either TCO opens during a clean cycle, the cycle
will terminate and the ERC will return to Time Of Day
(TOD). If either TCO is open at the start of a clean
cycle, the ERC will beep until the cancel button is
pressed; no failure code will be displayed. The error
code will be logged into the ERC memory and can
be retrieved in diagnostic mode. (See
Range Control (ERC) Failure Codes
176°F and close at 158°F.
To remove the cavity TCO:
1. Remove the left side panel. (See
2. Disconnect the 2 wires from the TCO.
3. Remove the two 1/4-in. hex-head screws that
hold the TCO to the oven cavity.
Electronic
.) Both TCOs open at
Disconnect
Disconnect
.)
Side Panel
– 51 –

Lockout Relay

The ERC operates a lockout relay that prevents the
upper oven from operating when the lower oven
is in self-clean. When the lower oven is placed into
self-clean, the ERC sends line voltage to the lockout
relay. The energized relay disconnects line voltage
to the upper oven thermostat control. The ERC also
uses this relay to terminate the upper oven self-
clean cycle at a preset 5-hour cycle.
The ERC activates the lockout relay from the
OUT WD terminal when in the clean cycle. When
powered, the relay opens the cycling contact circuit
of the thermostat (NC contact). In the upper oven
clean cycle, the ERC powers the thermostat thru the
MDL terminal.
Clean Cycle
To remove the lockout relay:
1. Remove the left side panel. (See
2. Disconnect the 5 wires from the lockout relay.
3. Remove the two 1/4-in. hex-head screws that
hold the lockout relay to the bracket.
.)
Side Panel