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14
C - Electrical Components / Operation
To Check/Replace Relay
1. Disconnect electrical supply to refrigerator.
2. Remove bale wire holding relay to
compressor.
3. Remove relay assembly from compressor.
(See Figure C2.)
4. Use small, flat-bladed screwdriver to
disconnect leads to relay assembly.
5. Use flat headed screwdriver to gently pry
capacitor from relay assembly.
6. Use ohmmeter to check resistance between
terminals 5 and 6. Resistance should be 3 to
12 ohms at normal room temperature. Shorted
relay will read 0 ohms. Open relay will read
very high or infinite resistance.
7. If ohm readings are out of range, replace relay.
8. Reverse this procedure to re-assemble.
NOTE
When replacing leads to the PTC relay, ensure
locking tabs snap into terminal.
Overload Protector
The overload protector is completely thermally
operated. It will open from excessive heat or current.
Unlike prior overloads, the internal bi-metal is not
self-heating, and is not a part of the electrical circuit.
The overload has a small built-in coil heater that is
in series with the compressor start and run windings
(See Figure C3).
To Check/Replace The Overload Protector
1. Disconnect electrical supply to refrigerator.
2. Remove bale wire holding relay to
compressor.
3. Remove relay assembly from compressor.
4. Use flat headed screwdriver to gently pry
capacitor from relay assembly.
5. Use small, flat-bladed screwdriver to
disconnect leads to relay assembly. (Note:
On some models you will have to remove bale
wire and cover, to gain access to relay and
overload protector.)
6. Use ohmmeter to check resistance between
tab terminal and female pin terminal. Overload
protector should have less than 1 ohm of
resistance at normal room temperature.
7. If ohm readings are out of range, install new
Starter/Overload Assembly. See Figure 2.
8. Reverse this procedure to re-assemble.
NOTE
When replacing leads to the PTC relay, ensure
locking tabs snap into terminal.
Run Capacitor
The run capacitor has permanently attached terminals
which are connected to relay terminals 2 and 3.
NOTE
Some models are not equipped with a run capacitor.
To Check/Replace The Run Capacitor
1. Disconnect electrical supply to refrigerator.
2. Remove bale wire holding relay to
compressor.
2. Use small, flat-bladed screwdriver to
disconnect leads to relay assembly.
3. Use flat-bladed screwdriver to gently pry
capacitor from relay assembly.
4. Discharge capacitor by shorting across
terminals with 500K (1 watt) resistor for one
minute.
5. Use ohmmeter set on the "Ohms times
1000" scale (if available), to check resistance
across capacitor wire terminals.
• The needle should jump towards zero ohms
and quickly move back to infinity.
• If the needle does not move, the capacitor is
open.
• If the needle reads a constant value at or near
zero ohms, the capacitor is shorted out.
• If the needle jumps toward zero and then
moves back to constant high resistance (not
infinity), the capacitor has a high resistance
leak.
6. If ohm readings are out of range, replace
capacitor.
7. Reverse procedures to re-assemble.
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