Question about Ruud UAKA030 Air Conditioner

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Buzzing on unit

I checked the contacts. I cleaned them with emery paper to try and make sure there was a good contact. But the buzzing keep on. The buzzing is coming from the brown connector where the contacts are. I am assuming that is the coil? I am guessing I need to replace it since cleaning up the contacts didn't work. Is there something else I should do? If I need to replace it would I need to order the part from a HVAC company or can I get it from a hardware store i.e. Home Depot?

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It sounds like the buzzing is a bad coil. the part is not carried at Home Depot you will have to fine it at an A/C supply house.
there are different types. there are single pole and double pole.
single pole have one set of contacts. doulbe pole have 2 make sure to get the right one. also make sure you get a 24 volt coil.
you could maybe order the part on line.
When changing the contactor. SECURE POWER to the condenser and the air handler remove the existing contactor from the cabinet leaving all the wires connected to it if possible. you may have to disconnect the power leads comming in. Swing it out of the way. Install the new contactor in place then move the wires one at a time matching location from old to new. Do NOT
get them mixed up. Or you could make a drawing of the part on paper locating the wires so you then may return them to the proper location. If you feel this may be to difficult for you call a service company and ask there charge to replace a contactor.
The part is usually @ 12.00 to 15.00 our cost so the part should be @ 30.00 0r 40.00 retail. then a service call charge.
good luck if you need more help let me know

Posted on May 17, 2008

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Is the buzzing in the outdoor half of the system? If so
your possibilities are.
buzzing could be the contactor. In the control compartment on the side of the unit there is a small brown component that has wires to one side and the other . There are contacts in the center like points on a car. If the points are pulled in look for ants in between the contacts. Always secure power to the outdoor unit before touching anything inside. If the points are pulled in check your breaker to the outdoor unit. Turn the breaker off then back on. Breakers sometimes trip but look ok.
Buzzing could be thee coil to the contactor itself, sometimes with age the coil will breakdown and cause noise.
if you give me more information I can focas in closer to a solution

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