COMPLAINT | CAUSE |
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Fan motor noise. | Fan |
| If cracked, out of balance, or partially missing, | ||
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| replace it. | |
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| Blower |
| If cracked, out of balance, or partially missing, | |
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| replace it. | |
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| Loose set screw |
| Tighten it. | |
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| Worn bearings |
| If knocking sounds continue when running | |
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| replace the motor. If the motor hums or | |
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| noise appears to be internal while running, | |
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| replace motor. | |
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Compressor will not run, | Voltage |
| Check voltage. See the limits on the preceding | ||
fan motor runs. |
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| page. If not within limits, call an electrician. | ||
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| Wiring |
| Check the wire connections; if loose, repair or | |
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| replace the terminal. If the wires are discon- | |
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| nected, refer to wiring diagram for identification, | |
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| and replace the wires. Check the wire connections; | |
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| If not according to the wiring diagram, correct | |
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| the connections. | |
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| Rotary |
| Check for continuity, refer to the wiring diagram | |
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| for terminal identification. Replace the switch if | |
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| the circuit is open. | |
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| Thermostat |
| Check the position of knob. If not at the coldest | |
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| setting, advance the knob to this setting . | |
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| Check the continuity of the thermostat. Replace | |
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| the thermostat if the circuit is open. | |
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| Capacitor (discharge |
| Check the capacitor. | |
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| capacitor before |
| Replace if not within ±10% of manufacturer’s | |
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| servicing.) |
| rating, replace if shorted, open, or damaged. | |
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| Compressor |
| Check the compressor for open circuit or | |
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| ground. If open or grounded, replace the | |
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| compressor. | |
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| Overload |
| Check the compressor overload if externally mounted. | |
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| Replace if open. (If the compressor temperature is | |
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| high, remove the overload, cool, and retest.) | |
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Compressor cycles on | Voltage |
| Check the voltage. See the limits on the | ||
overload. |
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| preceding page. If voltage is not within these limits, | ||
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| call an electrician. | |
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| Overload |
| Check overload, if externally mounted. | |
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| Replace if open. (If the compressor temperature | |
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| is high, remove the overload, cool, and retest.) | |
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