Serving Pontiac, MI and surrounding areas
Approved
In business since 1998
Free estimates
Emergency services offered
"Tech was very professional considering the down pour of rain that happened when he was working on the unit. He answered all my questions and was quick and professional."
+9
Serving Pontiac, MI and surrounding areas
Approved
In business since 2020
Free estimates
Credit card accepted
We are top Rated locally Veteran owned and operated Mechanical Air conditioning and heating contractor,We specialize in all phases of heating and cooling services, residential and commercial,installs, repairs, service maintenance, and more! We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today! \n
Serving Pontiac, MI and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Jeff was very responsive to my initial phone call, and Bryan arrived right on time and was very professional and friendly. He went right to work and did a fine job of installing the appropriate ductwork to direct heat and cool air out through the toe-kick under my-yet-to-be-installed vanity in the master bathroom. The previous owners had allowed the heat and cool air to funnel directly into the empty space under the old vanity, thereby trapping it and not getting any use out of it. I have another bathroom that needs the same treatment when it comes time for a new vanity, and I also need to replace a 29-year-old furnace and A/C. I'm very happy with their work and would hire them again in a heartbeat.
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Serving Pontiac, MI and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Zack and his crew did a great job replacing our furnace, even worked on Sunday so we could have heat!! Would highly recommend them to anyone..."
Serving Pontiac, MI and surrounding areas
Approved
In business since 2015
Emergency services offered
Warranties offered
"I hired midpoint cool temp to install furnace & air conditioner, the price was negotiable, fast service clean area , I will recommend family and friends"
Serving Pontiac, MI and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"Technician was A1 in tuning up and checking my system and answered all my questions. He checked my air conditioning, changed the filter in furnace and cleaned AC !! Get the pre summer special at $69. Well worth it."
Serving Pontiac, MI and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Did a great job. Went right to work and followed up to make sure everything was alright. Very happy with their install. Not to mention was a large home and had central air installed. Very professional"
Serving Pontiac, MI and surrounding areas
Approved
In business since 2025
Free estimates
Offers commercial services
"Safe air was wonderful to work with with they came in on time and made sure they did a great job we will be using them again in the future"
+3
Serving Pontiac, MI and surrounding areas
Approved
Free estimates
Emergency services offered
Small jobs welcome
At Smart Zone Heating & Cooling, we provide reliable, high-quality heating and cooling services for both residential and commercial customers. Our goal is simple: deliver dependable HVAC solutions that improve comfort, efficiency, and long-term performance.\n\nAs a licensed and insured HVAC contractor, we specialize in professional installation, repair, and maintenance of heating and cooling systems. Whether you need a new furnace installation, air conditioning repair, system replacement, or preventative maintenance, we focus on doing the job right the first time.\n\nWe take pride in offering honest recommendations, fair pricing, and high-quality workmanship. Our team understands that HVAC systems are one of the most important components of any home or business, which is why we work efficiently, communicate clearly, and treat every property with care and respect.
Serving Pontiac, MI and surrounding areas
Approved
In business since 2020
Free estimates
Credit card accepted
"The morning our air went out I spoke with Allison and she made sure that they could get out to us right away! Randy and Karla came that day did an amazing job with our AC/Furnace replacement. Great people at a great price. Our systems work amazing now. I recommend them too all my friends and family!"
Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.
Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.
Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.
Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.
Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.
From average costs to expert advice, get all the answers you need to get your job done.
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