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★★★★★ 4.9 · 1,100+ reviews
Lic. CAC1819196 · CFC1431159
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Troubleshooting

AC Making Clicking Noise? 4 Causes

Clicking sound from your indoor or outdoor AC unit? Usually electrical, relay, thermostat, or control board cycling. FREE diagnosis. Flat-rate pricing on every approved repair. CAC1819196.

Quick Answer

AC clicking in Tampa = 4 causes: (1) relay cycling (most common, $279 fix), (2) thermostat wiring loose, (3) failed control/defrost board ($299), or (4) debris inside outdoor unit (fan blade hitting something). Rapid/repeated clicks indicate failing relay or control. FREE diagnosis. Call (813) 343-2212.

4 Causes of Clicking AC

Failed Relay

Call a tech

Symptom: Rapid repeated clicks when AC tries to start. Unit may not fully power on.

Relay replacement $279. Common after Tampa storms.

Loose Thermostat Wire

Call a tech

Symptom: Intermittent clicks, AC doesn’t respond consistently.

Thermostat wire inspection + reseating $279. Low voltage cable replacement if damaged: $779.

Failed Control Board

Call a tech

Symptom: Erratic clicking, AC behavior inconsistent. Error codes on some models.

Control/defrost board replacement $299.

Debris in Outdoor Fan

DIY possible

Symptom: Mechanical clicking from outside unit. Fan blade hitting something.

DIY: turn off + clear visible debris. Pro: fan blade replacement $349.

What to Do Right Now

  1. Listen, is click INSIDE or OUTSIDE unit?
  2. Check outdoor unit for debris (twigs, leaves in fan).
  3. Check thermostat, set to COOL + AUTO fan.
  4. If clicking persists, call for FREE diagnosis.

FREE in-home diagnosis. Most click fixes $279-$349. AC repair pricing.

FAQ

Is clicking dangerous?

Usually not immediately, but rapid clicking (relay cycling) stresses the compressor. Don’t let it continue more than a few days.

Clicking when AC turns off?

Normal brief click as contactor disengages. Continuous post-shutoff clicking = relay issue.

Clicking from thermostat?

Low voltage relay inside thermostat is normal. Loud or rapid clicks from thermostat = bad thermostat ($349-$899 replacement).

Can I fix it myself?

Only debris removal from outdoor fan. Electrical components require licensed tech.

Warranty on relay replacement?

1-year Home Therapist labor warranty standard.

Need Tampa Service Today?

Same-day Tampa Bay. FREE diagnosis. (813) 343-2212.

★★★★ 4.8 (1,335 verified reviews)
Verified4.8★ · 1,335 reviews
🛡 FL Licensed: CAC1819196 · CFC1431159💼 $1M General Liability + Workers’ Comp🏠 Family-owned since 2017⚡ Same-day service
★★★★★

On time service every few months.. they call ahead to schedule.. they confirm appointments before appointment date and also advise day of when they are on the way!! Great customer service!! Thank…

Linda Silva · · Google
★★★★★

They have a quick response time and are easy to communicate with. The service was done well, and Alejandro was very friendly and professional.

Sylvia Hernandez · · Google
★★★★★Maintenance

I use the Home Therapists for routine maintenance on my ac unit and water unit. The service is affordable and they do a good job providing routine maintenance to prevent big problems…

Steven Kranjc · · Google
★★★★★Water heater

This company handles my AC maintenance and i purchased a brand new water heater as well. They are excellent. Very responsive and thorough. I’ve had the same technician always coming to the…

Jessica Ahearn · · Google
★★★★★AC repair

Dusty did a great job and provided honest service and pricing for our AC repair. He also went above and beyond in giving sound advice on our new home renovations!

Dalton Grados · · Google
★★★★★Plumbing

I had a great experience with Alejandro from Home Therapist Cooling, Heating, and Plumbing. He repaired two toilets and installed the water line to my new refrigerator after the delivery team refused…

Thomas Jones · · Google
★★★★★AC repair

Amazing service from start to finish. My AC system completely stopped working, and they were able to come out the same day, which was a huge relief. The technician was professional, knowledgeable,…

Manny Velasquez · · Google
★★★★★Water heater

As an engineer/fabricator/assembler, I have high standards from my contractors. This guy Sam, he fulfilled all my requests and installation needs. He took pride of his work, and left me with a…

ALEXANDROS ORESTIS · · Google
★★★★★Plumbing

A big THANK YOU to Home Therapist Cooling, Heating and Plumbing for running sewer pipes to our RV and shed! Samuel was beyond amazing! He was prompt, professional, and his communication style…

Mindy Walker · · Google
Latest review: May 2026 · auto-refreshed daily
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Reviewed by Richard MoralesCo-Owner & FL Class B Air Conditioning Contractor, Home Therapist

Richard co-owns Home Therapist Cooling, Heating, and Plumbing and holds the FL Class B Air Conditioning Contractor license (CAC1819196) since 2017. The company holds licenses CAC1819196 (FL Class B AC Contractor, Richard Morales) and CFC1431159 (FL Plumbing Contractor, Alex Morales), serving the Tampa Bay metro with a six-technician field team and 1,378+ verified five-star reviews.

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