Pumps rarely fail. Fewer than 10% of all pump failures are caused by a manufacturer defect. Pump should be checked for indications of failure mode prior to replacement.
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It is important when servicing a unit, to check all components, wiring, and voltages.
Pulling a good vacuum before charging a new system with refrigerant or after a repair is essential for the proper operation of an air conditioning or heat pump system.
Start Capacitor Overview: Functions and Testing.
It's that time of year when we see a run on capacitors. This article explains some facts about capacitor quality.