22
SERVICING
Testing Primary Limit Control
S-301 CHECKING AUXILIARY
LIMIT CONTROL
BLOWER HOUSING
AUXILIARY LIMIT CONTROL
Auxiliary Limit Control Location
WARNING
HIGH VOLTAGE
Disconnect ALL power before servicing or in
-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper
-
ty damage, personal injury or death.
VOLT / OHM
METER
RED
RESET
BUTTON
COLOR
IDENTIFYING
TAB
Testing Auxiliary Limit Control
WARNING
To avoid possible fire, only reset the auxiliary limit control
once. If it should open a second time, a qualified servicer
must determine why the auxiliary limit opened before
resetting again.
S-302 CHECKING FLAME
ROLLOUT CONTROL
A temperature activated manual reset control is mounted to
the manifold assembly on 80% furnaces.
ROLLOUT
SWITCH
Flame Rollout Switch Location
(80% Upflow Furnace Shown, Downflow Similar)
