TM 9-4120-371-14
b. Heater replacement. (Refrigerant system discharge is not required.)
(1) Check to see that the power has been disconnected at the power source and covers have been
removed during access and testing.
Allow heater to cool before touching. Severe burns can result from touching hot heater.
(2) Tag and disconnect two heater leads from junction box terminals.
*(3) Using pliers, remove band on heater.
**(4) Using pliers, remove clip from heater well.
*(5) Spread the heater ends to clear junction box.
**(6) Pull heater from well.
*(7) Lift heater up and off compressor crankcase.
(8) Install new heater as follows.
*(9) Spring heater ends apart and place heater down and around compressor in position on crankcase.
Using pliers, secure heater on crankcase with metal band.
**(10) Insert heater into well. Using pliers, secure in well with clip.
(11) Run leads through the grommet in the compressor junction box.
(12) See tags on the removed heater. Connect heater leads to J4 pins F and G.
(13) If this completes the repair, install junction box cover.
*Effective for Carrier Compressor
**Effective for Keco Compressor
