MAC Heating and Cooling Inc

Residential Heating and Cooling Repair That Fixes the Cause

When the AC quits in August or the furnace stops lighting in December, you need a straight answer fast and a price before the work starts. MAC Heating and Cooling Inc has been running home HVAC repair service calls since 2017. We diagnose the actual failure, show you what we found, and quote the fix before we touch anything.

Why Homeowners Choose MAC Heating

🔧 Repairing Home Systems Since 2017

✓ Licensed HVAC Technicians, EPA Certified

💲 Diagnostic Fee Quoted Before We Roll

📋 Written Repair Price Approved Before Work

⏰ Same Day & After Hours Availability

🛠 Common Parts Carried to Finish in One Visit

Benefits of Our Residential Heating and Cooling Repair

Any no heat visit includes inspection of burners, venting and combustion behavior, because a heating fault can be a safety issue rather than just a comfort one.

You know the price before we start

Your diagnostic fee is quoted on the phone and the repair price is written down and approved by you, so nothing appears on the invoice that you did not agree to first.

We diagnose the cause, not just the broken part

Finding why the component failed is what keeps the same repair from coming back next season, and it is the difference between a fix and a delay.

Most repairs finish in one visit

We stock the parts that fail most often, including capacitors, contactors, flame sensors and common motors, so you are not waiting days with no heat or no cooling.

Honest guidance when a repair stops being worth it

If your system is heading into repeated failures, we show you what you have spent and what a replacement would cost rather than quietly selling you another patch.

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Our Services

Repair is where most homeowners first meet us, but we handle the full range of residential heating and cooling work.

Residential HVAC Installation

Complete central heating and cooling systems installed from the load calculation forward, with matched equipment, permitting and final performance testing. This is the path we recommend when repair costs stop making sense.

Residential Heating and Cooling Repair

Diagnosis and repair of cooling and heating faults across central systems, heat pumps and furnaces. We test before we quote, price the repair in writing, and carry common parts so most visits end with a working system.

Residential Duct System Installation

Design and installation of home duct systems, including sealing, insulating and testing every run. Poor duct performance is behind a surprising share of comfort complaints that get blamed on the equipment.

Residential Air Filtration Installation

Whole home air purification, UV air scrubbers and high capacity media filtration built into the system. Better filtration also protects the equipment, since restricted or dirty airflow drives a large share of repair calls.

Residential Heat Pump Installation

Air source and ductless heat pumps that handle heating and cooling from one system. A common upgrade path for homeowners tired of paying to keep aging gas equipment alive.

Residential Ductless Mini Split Services

Single zone and multi zone ductless systems for additions, garages, ADUs and rooms the main system never reached, including service and repair of existing mini splits.

What Is Residential Heating and Cooling Repair and What Does It Involve?

Residential heating and cooling repair is the diagnosis and correction of faults in a home comfort system that is still worth keeping, as opposed to replacing the equipment outright. A proper repair visit starts with diagnosis rather than parts. A technician tests the thermostat and its wiring, checks the filter and airflow, measures refrigerant pressures and temperature split on the cooling side, inspects burners, ignition and venting on the heating side, and tests capacitors, contactors, motors and safety controls electrically.

Diagnosis matters more than the part because most HVAC failures have a cause behind them. A capacitor that fails and gets ignored forces the compressor to strain on startup, and a repair worth a couple of hundred dollars can turn into a compressor job running anywhere from $1,100 to $4,650. A tripped limit switch on a furnace almost always has a secondary cause such as a clogged filter or blocked vents, so swapping the switch without finding the airflow problem just buys you a few weeks. MAC Heating and Cooling Inc has been handling residential HVAC troubleshooting service calls since 2017, and our approach is simple. Everything else we handle is listed on macheatingandcoolinginc.com.

Home Heating Repair for a Cold House

An air conditioner that runs without cooling is the single most common summer call, and it has a short list of usual causes. A failed run capacitor is at the top, which typically shows up as humming from the outdoor unit with the fan not spinning, or the system struggling to start on hot afternoons. Contactors pit from arcing and stop pulling in. Condenser fan motors seize on their bearings, the unit overheats, and the compressor shuts itself down on a safety.

A restricted filter or blocked return starves the coil until it freezes solid, which looks like an ice problem but is really an airflow problem. Refrigerant loss is the other big one, and it always means a leak, because a sealed system should not consume refrigerant. Our home AC repair visits measure pressures and temperature split rather than guessing from symptoms, and on a suspected leak we locate and repair the leak instead of simply topping the system up and leaving you to lose it again. Rooms that never came right even when the system worked usually point to Ductwork Installation.

Our Work Process

Our advanced air scrubbers and filtration systems remove airborne pollutants and allergens, delivering cleaner, healthier air for your home year round.

Call and describe the symptom

Tell us what the system is doing, whether that is warm air, no ignition, odd noises or a breaker that keeps tripping. We quote the diagnostic fee up front and book the visit.

On site diagnosis and written quote

We test the system, identify the failure and show you what we found. You get a firm repair price before any work begins.

Repair and verify

We complete the approved repair, then run the system and confirm it is performing correctly before we leave.

Enjoy Cleaner Air

Enjoy noticeably cleaner, fresher indoor air and greater peace of mind for your entire household. Enjoy noticeably cleaner, fresher indoor air.

No Heat Calls and Heating System Repair for Homes

On the heating side the most frequent fault is a dirty or failing flame sensor. The burners light, the sensor fails to confirm combustion, and the gas valve closes as a safety measure, so you hear the system try and then give up while the blower keeps running. Ignitors, pressure switches, inducer motors and control boards make up most of the rest. Two findings deserve real attention. A tripped limit switch is a symptom, and the underlying cause is usually restricted airflow from a clogged filter or blocked vents, so we chase the airflow rather than resetting the switch.

The more serious one is a cracked heat exchanger, which allows combustion gases including carbon monoxide to reach the air you breathe and cannot be repaired, only replaced. Warning signs include a yellow or fluttering burner flame that moves when the blower starts, soot around the furnace or flue, rust flakes in the burner compartment, and a carbon monoxide alarm. If a CO alarm sounds, get everyone outside first and call afterward. When we suspect a crack we verify it with flame behavior and a combustion analyzer, and we show you the evidence rather than asking you to take our word for it. Where the unit is past economical repair, we move the conversation to Furnace Installation rather than another part.

Emergency, Same Day and Weekend HVAC Repair

Some repairs can wait for a weekday appointment and some cannot. A home with no heat during a cold snap, a household with elderly residents or infants during a heat wave, a system tripping its breaker repeatedly, a gas smell, or water pouring out of an air handler are all reasons to call immediately rather than in the morning. After hours and weekend service normally carries a premium across the industry, commonly an additional $50 to $150 over standard rates, and we tell you what that looks like when you call instead of surprising you on the invoice.

If your situation can safely wait until the next business day, we will say so, because paying an emergency rate for a problem that is stable helps nobody. We prioritize no heat and no cooling calls over routine appointments, and we would rather give you an honest answer on the phone about timing than book you in and leave you waiting all day. Tell us what the system is doing through Contact Us and we will tell you how soon we can be there.

Preventive Maintenance That Reduces Repair Calls

Most of the failures described above give warning long before they strand you. Capacitors weaken over several seasons before they quit. Flame sensors coat with carbon gradually. Drain lines clog slowly. Filters restrict airflow over months, and restricted airflow is the root cause behind a large share of both frozen coils in summer and overheating furnaces in winter. Industry figures suggest homeowners on maintenance plans spend meaningfully less on emergency repairs over the life of a system, mostly because a tune up catches a failing part at a scheduled visit instead of at 9pm on a holiday weekend.

A maintenance visit from us covers filter and airflow checks, electrical testing of capacitors and contactors, refrigerant pressure readings, condensate drain clearing, burner and venting inspection, and a report of anything trending toward failure. We book home HVAC maintenance and repair together where it makes sense, so a small problem gets handled while we are already on site.

Frequently Asked Questions

What is a diagnostic fee, and do I still pay it if I go ahead with the repair?

A diagnostic fee covers the technician’s visit and the 30 to 60 minutes of testing needed to identify the actual fault rather than guess at it. Across the industry it usually runs somewhere between $75 and $150 for a single system during business hours, and most companies credit it toward the repair if you approve the work on the same visit. Ask any contractor two questions before booking: what the fee is, and whether it comes off the repair total.

My AC is running but only blowing warm air. What is usually wrong?

In most cases it is one of four things: a failed run capacitor, a pitted contactor, a condenser fan motor that has stopped turning, or refrigerant loss from a leak. A clogged filter can also starve the coil until it freezes and stops cooling entirely. Turn the system off if you see ice on the refrigerant lines, since running it frozen risks damaging the compressor, and call for a diagnosis rather than adding refrigerant.

Why has refrigerant become so expensive to add?

Because R-410A production is being phased down under the federal AIM Act, and reduced supply has pushed wholesale prices up sharply since 2024. That cost flows into every recharge. It also changes the math on a leaking system, since a refrigerant top up you repeat every eighteen months gets more expensive each time. This is why we locate and repair the leak rather than selling you refrigerant on a schedule.

A contractor told me I have a cracked heat exchanger. Should I get a second opinion?

It is a reasonable thing to verify, because a cracked exchanger means a furnace replacement and is therefore one of the most oversold diagnoses in the trade. A real diagnosis is usually backed by evidence you can see, including flame movement when the blower starts, soot or rust in the burner compartment, and combustion analyzer readings from the flue. Ask to be shown the evidence. If nobody can show you any, get another opinion before spending thousands.

Does regular maintenance actually reduce repair costs, or is it just an upsell?

It reduces them, and the mechanism is specific rather than vague. Most expensive failures begin as cheap ones, such as a weakening capacitor that eventually strains the compressor, or a restricted filter that overheats a heat exchanger. A scheduled visit catches those while they are still small parts. It will not make a system immortal, and any company promising that is overselling, but it reliably moves failures from emergency visits into planned ones.

System Down and Not Sure Who to Call?

Tell us what it is doing and we will tell you what it is likely to be, what the visit costs, and how soon we can get there. No heat and no cooling calls go to the front of the queue, and you approve the repair price before we start.

Reach Out to Our Team

Contact our professional experts today to discuss your heating or cooling needs and discover reliable solutions for your beautiful family home.

Areas We Are Serving

We take repair calls across Sonoma County and the neighboring North Bay communities, including parts of Napa, Marin and Mendocino counties. Being local means our trucks are usually close enough to reach most of these areas the same day for urgent no heat and no cooling calls. Routine repairs and maintenance visits are typically scheduled within a few days.