Professional AC Repair in Metro Detroit — OnPoint HVAC
Metro Detroit's #1 AC Repair Pro's
Michigan summers push heat and humidity into ranges that overwhelm undersized or poorly maintained air conditioning systems. When your AC fails during a July heat wave, waiting days for a repair isn't just uncomfortable — it can be a genuine health risk for young children, elderly family members, and anyone with heat-sensitive medical conditions. OnPoint HVAC provides fast, reliable, engineer-led AC repair throughout Metro Detroit.
Founded by mechanical engineer George Petrentzev, OnPoint HVAC approaches every air conditioning service call with precision and rigor. We diagnose the underlying cause of your AC problem and fix it correctly — the first time. We provide HVAC services across Metro Detroit for both cooling and heating needs year-round.
Common AC Problems We Fix
1. AC Not Cooling The most common complaint we receive. If your air conditioner is running but not producing cold air, the problem could involve low refrigerant, a failing compressor, a dirty condenser coil, or restricted airflow. A thorough diagnostic inspection will identify the exact cause.
2. Refrigerant Leaks Low refrigerant is not a normal operating condition — it means your system has a leak. Refrigerant leaks reduce cooling capacity, cause the compressor to work harder, and can lead to full system failure if left unaddressed.
3. Frozen Evaporator Coil A frozen evaporator coil typically results from restricted airflow, a dirty coil, or low refrigerant. If you notice ice on your indoor unit or reduced airflow from your vents, shut the system off and call us immediately to prevent compressor damage.
4. Unusual Noises Grinding, banging, squealing, or clicking sounds indicate mechanical issues that need professional attention. Common causes include loose or failing blower components, motor bearing wear, or debris in the outdoor condenser unit.
5. AC Won't Turn On If your air conditioner fails to start, the issue may lie with the thermostat, electrical supply, capacitor, or contactor in the outdoor unit. Our technicians diagnose the exact point of failure rather than guessing.

Our AC Repair Process
Step 1: Diagnostic Inspection We begin with a comprehensive inspection of your AC system — indoor air handler, outdoor condenser unit, refrigerant levels, electrical components, airflow measurements, and thermostat operation.
Step 2: Honest Assessment We explain exactly what we found and what it means for your system. Clear, straightforward explanation of the problem, the risk of leaving it unaddressed, and all available repair options.
Step 3: Repair or Replace Recommendation We provide an honest recommendation based on the age of your equipment and the cost of the repair. If a new system makes more economic sense, we'll discuss AC installation services transparently. We also offer ductless mini-split systems as an alternative where appropriate.
Step 4: Full System Test After completing the repair, we run a complete operational test verifying refrigerant pressure, airflow, supply and return temperatures, thermostat calibration, and electrical safety.
Why Choose OnPoint HVAC
- Engineer Led Diagnostics. We treat your air conditioning system as an integrated mechanical assembly — finding problems other companies miss.
- Licensed and Insured. Michigan mechanical contractor license, full liability and workers' compensation insurance.
- Fast Local Response. Based in Livonia, serving the entire Metro Detroit region. When you call during a heat wave, you're working with a local team.
- Transparent Pricing. Full repair cost quoted before any work begins. We offer HVAC financing options for larger repairs. Request a free estimate online at any time.
Metro Detroit Service Area
Livonia, Dearborn, Troy, Northville, Plymouth, Farmington Hills, Canton, Westland, Redford, Sterling Heights, Warren, Southfield, and Ann Arbor. Call (248) 331-8090 to confirm availability. See our full AC maintenance and tune-up services to keep your system running between repairs.
Frequently Asked Questions
How much does AC repair cost in Metro Detroit?
AC repair costs generally range from $150 to $700 depending on the problem and parts required. At OnPoint HVAC, we provide upfront pricing after the diagnostic inspection — you know the full cost before we begin any work. Request a free estimate to get started.
Should I repair or replace my air conditioner?
Central AC systems typically have a service life of 15 to 20 years. If your unit is over 12 years old and the repair cost exceeds one-third of the cost of a new system, replacement often delivers better long-term value. Our engineer-led team will walk you through both options honestly.
How long does an AC repair take?
Most standard AC repairs are completed in a single visit, typically 1 to 3 hours. More complex repairs may require a follow-up appointment if parts need to be ordered.
Keep Your Home Cool All Summer. Call OnPoint HVAC.
Call us today at (248) 331-8090 or request a free estimate online.
OnPoint HVAC — Licensed. Engineer-Led. Family-Owned. 27788 Joy Road, Livonia, MI 48150
AREAS WE SERVE
- BERKLEY
- BIRMINGHAM
- CANTON
- FARMINGTON
- FARMINGTON HILLS
- FERNDALE
- FRANKLIN
- LIVONIA
- NORTHVILLE
- NOVI
- PLYMOUTH
- REDFORD
- ROYAL OAK
- SOUTHFIELD

