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Freightliner Refrigerator Troubleshooting Guide
750000005 (TJ18F)
750000011 (TJ22F)
750000026 (TJ18FP3)
DOMETIC CORPORATION, ENVIRONMENTAL DIVISION
P.O. Box 15299 I Richmond, VA 23227 USA
Phone +804 746 1313 | Fax +804 746 7248
www.dometic.com Page 6 of 20
Thermostat knob lead connections
If the thermostat is working correctly, the multimeter should indicate continuity.
In addition, check the speed resistor with the multimeter. This resistor is used to set
the compressor motor speed. Connect multimeter leads to either end of resistor
assembly and set meter to resistance, Ω. This is a 277-ohm resistor. It should read
between 265 and 280 ohms.
11. An additional test to use if a multimeter is not available:
Turn the unit off and disconnect both blue wires that were connected to the Danfoss
module terminals “T” and “C”. Place the jumper wire across these terminals as
illustrated.
Energize unit and if unit operates, this action indicates the problem may be a bad
thermostat. Replace thermostat.