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Knowing How to Repair an Air Conditioner

Since it takes time for a technician to show up and repair your air conditioning unit, you may want to try repairing it yourself, for as long as you’re comfortable with the idea and have a little know how on fixing it, this decision should save you money, as well as discovering why your air conditioner failed to work.

The first step is to find out if the furnace isn’t the problem, so set first the air conditioner in a thermostat mode and try to lower the temperature setting and check if the furnace fan is operating, because if it does, the problem isn’t in the furnace; however, if the fan doesn’t run, try to reset the furnace circuit breaker and do the process once again, and if it still doesn’t run, it’s probably time to have your unit checked by a technician. Next is to check the external condensing unit and find out if the compressor and fan are working; otherwise, you’ll have to start the troubleshooting.

It is important that you shut off power first before troubleshooting and to do that: shut off the air conditioner and furnace breakers in the main electrical panel, before you remove the access panel of the condensing unit and then use a voltage tester on the wires which are linked into the contractor to ensure that the power is really shutdown.
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Once the power is off, you may now remove and set aside the access panel retaining screws and remove the panel and check if there are signs of rodent’s nests or wires or electrical connectors being chewed, because if there are signs of these, it’s best to discharge the capacitor, but only do this if you have the knowledge of electrical repairs; therefore, remove the capacitor from its bracket and with an insulated screwdriver touch between the H terminal and the C terminal and do the same between the F terminal and the C terminal, after which, on a single-mode capacitors, make a short between the two terminals.
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In replacing a new capacitor, take first a photo of the wires before disconnecting anything, as a reference later on, then use needle-nose pliers to pluck one wire at a time from the old capacitor and try to snap it into the corresponding tab of the new capacitor, followed by wiggling each connector to see if it’s tight, such that when you’ve swapped all the wires, finally, secure the new capacitor.

As soon as you have reinstalled the access panel and disconnect block, turn on the circuit breaker and furnace switch, then set the thermostat to a lower temperature and, finally, wait for the air conditioning unit to start running again. Expect then for the compressor to run and the condenser fan to spin, but if it doesn’t, it’s time to call the pro.