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What a Humming Air Conditioner is Trying to Tell YouNormally, a properly functioning air conditioner makes occasional pops, hisses, rattles, and a quiet hum that shouldn't be a cause for concern. However, if you notice a loud humming or buzzing noise, your unit is probably malfunctioning. Several issues can cause a humming air conditioner. Let's take a closer look at them along with their solutions.

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HVAC system , air conditioner , air conditioning , a/c problems , HVAC problems , HVAC unit , humming

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"Very polite man and got furnace ready for winter"

Edith V.
(Google Review)

★ ★ ★ ★ ★

"Just signed up for a planned service agreement to keep my AC and Furnace tuned up. Great value and great service!"

Stefan Hartman
(Facebook Review)

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"I had an excellent experience with Hartman Brothers from start to finish. After dealing with an incomplete and frustrating repair from Peterman Brothers, Hartman Brothers was a breath of fresh air. Their technician spent several hours thoroughly troubleshooting my tankless water heater, walking through the issues clearly and professionally. There was no upselling, no pressure, and no shortcuts—just honest, methodical work. Based on their findings, I chose to upgrade to a new tankless water heater, and the decision was entirely mine. At no point did they try to push a sale or steer me toward anything unnecessary. The installation was clean, the communication was excellent, and the entire process felt transparent and trustworthy. It’s clear why they have such a strong reputation in the Fort Wayne area. Their professionalism, responsiveness, and genuine customer‑first approach really stand out. I’m very happy with the new system and with the service I received. "

Cory T.
(Google Review)

★ ★ ★ ★ ★

"We installed our new HV/AC and on demand water heater last year. The result is money saved year around. No huge water heater taking up space. And a great crew at Hartmans to service our unit in years to come. Great folks to do business with. Thank you!"

Phil S.
(Google Review)

★ ★ ★ ★ ★

"Just had a complete system put in - Duct Work, A/C and Furnace. These guys are amazing, they clean up as they go and so knowledgeable and very efficient. Highly Recommended!! Thank you Rick, Darren Brandon and Brad - You guys Rock!!"

Lisa B.
(Google Review)

★ ★ ★ ★ ★

"Hartman Bros representatives are wonderful! Caleb is super great at answering all my questions and explaining everything so I feel very much at ease. I definitely recommend Hartman Bros for heating and AC installation and servicing. Their employees are super polite and very helpful and pleasant! Great job as always!"

Renee C.
(Google Review)

★ ★ ★ ★ ★

"Technician was on time, professional and completed our HVAC service promptly. Would highly recommend Hartman Brothers!"

Eric Korte
(Google Review)

★ ★ ★ ★ ★

"Hartman Brothers service technician Ked Snyder was excellent. He serviced my air conditioning unit finding a leak without too much trouble. I give him five stars!"

Donald P.
(Google Review)

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