Suburban Mfg REGAL INTENSIVE CARE UNIT 12019-01-NGFREP - Manual (Page 157)

Form No. 702718 Rev. A March, 2005 145
Owner’s Manual - Regal Intensive Care Unit
Heat will not come on or will not hold constant.
First: Make sure the temperature set dial is set to a higher-than-
ambient temperature.
Second: Press the heat on/off switch several times and make
sure the amber light in the switch comes on. If the temperature set
dial is set to a higher-than-ambient temperature, the system light
should also come on. If the system light does not come on, it is a
strong hint that a deeper problem exists in the heat system.
Third: Check the circuit breakers to be sure they haven’t tripped.
Reset them if necessary. Refer to Re-setting the Circuit Breakers
on Page 60.
CAUTION: Before working on the electrical system,
make sure the unit is Off and the electric power cord
un-plugged.
Fourth: Check all wire connections behind the heat on/off switch,
on the thermostat, and on the heater.
Fifth: If not of the above fix the problem, replace the relay. Order
P/N 853415, and refer to Page 126 for replacement instructions.
Sixth: If replacing the relay does not help, you probably have a
defective thermostat or heater. Try operating the cooling system. If it
too fails, replace the thermostat. Order P/N 853421 and refer to
Page 113 for replacement instructions.
Seventh: If the thermostat is OK, replace the heater. Order P/N
853455 and refer to Page 132 for replacement instructions.
Remedial Action