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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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"Technician did an extremely thorough job during our annual HVAC check. He was friendly, efficient, and knowledgeable. Thank you! You just never disappoint"

Mary E.
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"I am a satisfied customer. I have been for over 50 years"

Kenneth K.
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"Hartman Brothers always comes through for us. The furnace quit working and they squeezed us in the same day. They diagnosed and fixed it quickly. We won't use anyone else!"

Debra Stellato
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"Service was timely and the techs were professional and pleasant. There was a hitch but it was taken care of quickly. I recommend this company."

W. Blume
(Google 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)

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"As always, Hartman Bros does service RIGHT! They are prompt, courteous, professional, clean and fairly priced for all services we've ever had completed. We were introduced to them in 1998 when we first used their services and have been faithfully returning for every Heating and Air need, including the building of 2 new homes. They are stellar performers providing excellence at a time when mediocrity has been touted as the norm in our society. They go well above and beyond in all they do."

Sheila Skinner
(Google Review)

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"Our Tech was amazing to work with, he was very patient and answered every single question that we had didn’t rush us at all. We had Hartman at our previous home, continued the service at our new home. Would highly recommend them to anyone!"

Jerry C.
(Google Review)

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"Service manager made room in the schedule for warranty work, it was very much appreciated and the service tech Caleb was awesome. We are new to the area and will be using this company. Great job!!"

John W.
(Google Review)

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