Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Before
After
Before
After
Before
AfterFast, Reliable Furnace Repair Across Lake Mary
Most furnace repairs in Lake Mary run between $150 and $700 depending on the part, and the majority of calls we handle are resolved same-day. If your furnace is blowing lukewarm air, short-cycling, or not kicking on at all, call us at (361) 306-9515 and a real person answers, any hour, any day. We dispatch crews to Lake Mary daily, and every job starts with a written price before any work begins.
We know Lake Mary’s HVAC rhythms. Homes here sit in a weather pattern that’s harder on furnace components than people expect. Winter nights dip into the 30s and low 40s, then daytime highs climb back into the 70s. That constant swing means furnaces and heat pumps cycle on and off far more often per season than they would in a colder, steadier market. The wear pattern is different, and so is the repair list. Capacitors, thermostat calibration, and limit-switch trips show up on our Lake Mary furnace repair calls far more often than cracked heat exchangers from prolonged deep-cold operation. When you call Dalton Heating & Air, you’re talking to a team that already understands that local pattern.
Our Furnace Repair team lives the same standard on every visit: arrive inside the window we give you, put the price in writing before touching anything, do the job by the book, leave the site clean, and guarantee the repair in writing for a full year. That’s The Garrison Standard, and it’s been in place since 2003.
Why Dalton Heating & Air Is Lake Mary’s Preferred Furnace Repair Company
We earn trust in Lake Mary the same way any good trades company does: by showing up, doing what we said, and standing behind the work. Homeowners tell us the reason they stay with us is simple. We don’t let a service call become a guessing game. The price is in writing before any work starts, on every job, without exception. No price that shifts at the door. No crew that arrives two hours late and can’t explain why.
Calls to Dalton are answered by a live person 24 hours a day, 7 days a week. That matters on a cold December night in Lake Mary when the furnace won’t ignite and you need to know if someone can actually come. You won’t get a voicemail queue or a callback window.
Our technicians are background-checked, uniformed, and factory-trained to service nine major HVAC brands, including Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We don’t send a parts-changer who has to call someone else for guidance. Marco Benitez, who leads the Dalton team, holds every technician to The Garrison Code on every single call.
We also work all over Lake Mary. From neighborhoods near Lake Mary Boulevard to communities off Rinehart Road and the Timacuan area, we’re familiar with the homes, the typical equipment, and the ductwork challenges these houses present.
Furnace Maintenance in Lake Mary
Furnace Maintenance in Lake Mary means keeping a heating system that cycles heavily through mild winter weeks running without surprise failures. A tune-up runs $80 to $200 and typically takes 60 to 90 minutes. Because Lake Mary furnaces sit idle for long stretches of the year and then get asked to work on short notice during cold snaps, components can seize, get dusty, or fall out of calibration during the off-season.
What a Tune-Up Actually Includes
We inspect the heat exchanger for cracks, test the ignitor, check gas pressure, verify the blower motor and capacitor, calibrate the thermostat, and tighten electrical connections. We also check static pressure. High static pressure from undersized or aging ductwork is a common issue in Lake Mary homes built with cooling-only loads in mind, and it chokes airflow, trips limit switches, and shortens blower motor life.
When Lake Mary Homeowners Should Schedule One
Book a tune-up in October or November, before the first real cold snap hits. That gives us time to find a weak capacitor or a dirty flame sensor before you need heat at 5 a.m. on a 38-degree morning. If you haven’t had maintenance in two years or more, schedule one before running the furnace hard.
Heat Pump Repair in Lake Mary
Heat Pump Repair in Lake Mary is a significant part of our winter workload, because many homes here use heat pumps rather than gas furnaces, and heat-mode issues often surface only on the coldest mornings. What a homeowner describes as a furnace not heating is frequently a heat pump struggling with a refrigerant charge or a reversing valve that’s failing under heat-mode load.
Why Heat-Mode Failures Sneak Up on You
In air-conditioning mode, a slightly low refrigerant charge may be barely noticeable. In heat mode, that same charge deficiency shows up as lukewarm air or the outdoor unit freezing over. We don’t just top off refrigerant and leave. We trace the loss, fix the leak when possible, and verify the reversing valve and defrost board are working before we call the job done. A refrigerant recharge, which is topping off the cooling fluid your system needs to reach set temperature, is only part of the fix if there’s a leak.
Paired Systems Need a Full Check
On a call off Rinehart Road near the Timacuan area, a homeowner reported the furnace blowing lukewarm air during a cold snap. Our tech traced it to a failed capacitor on the blower motor on an older Carrier unit. We swapped the capacitor, verified the heat exchanger and refrigerant charge on the paired heat pump, and confirmed static pressure was within range before leaving. That’s the difference between fixing the symptom and leaving a paired system ready for the next cold morning.
Trusted Brands We Service in Lake Mary
We service and repair all nine major residential HVAC brands, including Goodman, Rheem, and York equipment, which we see regularly in Lake Mary homes. Our trucks carry common capacitors, ignitors, flame sensors, pressure switches, and blower motors, so we’re not waiting on a parts house for most repairs. When a Daikin or Carrier component does need to be ordered, we tell you the lead time up front, in writing. No rolling arrival windows. No “should be here by Friday” without a date behind it.
Common Furnace Repair Problems We See in Lake Mary Homes
- Short cycling from mild winter nights followed by warm days. The constant on/off pattern stresses the capacitor and blower motor more than steady runtime would. We replace weak capacitors before they take the blower motor out with them.
- Heat pumps masking refrigerant or reversing valve issues. The system cools fine all summer, then acts up in heat mode on the first cold morning. We test both modes, not just the one that’s failing.
- High static pressure from older ductwork sized for cooling-only loads. It chokes airflow and trips the furnace limit switch. We measure it and tell you if the ductwork, not the furnace, is the actual problem.
- Dirty or miscalibrated thermostats causing temperature swings. The homeowner blames the furnace. We check the thermostat first, because in Lake Mary we see more wrong thermostats than failed gas valves.
Pricing for Furnace Repair in Lake Mary, FL
| Service | Typical Lake Mary Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Tune-Up | $80 – $200 |
| AC Repair | $150 – $650 |
| AC Installation | $3,500 – $7,500 |
Estimates are free. If the repair doesn’t hold, we return at no charge within the one-year written guarantee period. That’s the 365-Day Done Right Promise, and it’s included with every service call, not sold as an upgrade.
We Also Serve Cities Near Lake Mary
Dalton Heating & Air works throughout Central Florida around Lake Mary, including Longwood, Sanford, Altamonte Springs, and Winter Springs. If you live just outside Lake Mary in one of those communities, we likely cover your home too. Call (361) 306-9515 and tell us your street, and we’ll confirm coverage and give you a written price before any work starts.
Serving Lake Mary, FL - Our Local Coverage Area
We’re based in the Lake Mary area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in Lake Mary
Most furnace repairs in Lake Mary run $150 to $700, with capacitor and ignitor replacements at the low end, blower motors and gas valves mid-range, and heat exchanger work at the top. You’ll get an exact written price before any work begins, and every repair carries a one-year written guarantee. Call (361) 306-9515 for a free estimate.
Yes, if we’re replacing a furnace rather than repairing it, a Manual J load calculation is non-negotiable. Your existing system may have been sized for cooling-only loads, and Lake Mary’s older housing stock often has ductwork that can’t handle a bigger furnace. We measure the house, the windows, the insulation, and the ductwork before recommending equipment. Call (361) 306-9515 and we’ll explain what a proper load calculation changes about your quote.
SEER2 is the updated efficiency rating standard for air-source heat pumps and air conditioners, and it measures cooling efficiency under more realistic operating conditions than the old SEER test. For a Lake Mary home, a higher SEER2 means lower cooling bills during the long summer, but it matters for heating too if you have a heat pump. A SEER2 15.2 system uses less electricity than a SEER2 13.4 system year-round, and the difference shows up fastest on your July and August bills. Call (361) 306-9515 and we’ll compare real operating costs for your specific setup.
Short cycling in Lake Mary is usually caused by the furnace reaching temperature too quickly and shutting off, then starting again moments later. The most common culprits are an oversized furnace, a failing thermostat, high static pressure from restrictive ductwork, or a weak capacitor on the blower motor. It’s worth diagnosing properly, because short cycling wastes energy and shortens the life of the blower motor and heat exchanger. Call (361) 306-9515 and we’ll pinpoint the cause.
Repair is the right call if the furnace is under 15 years old and the failed part costs less than a third of a replacement system. Replacement makes sense when the heat exchanger is cracked, the unit uses R-22 refrigerant, or you’re facing repeat failures that indicate the system is at the end of its useful life. We’ll give you both numbers in writing: the repair cost and the installed replacement cost, with efficiency figures for each. Then you decide, with no pressure. Call (361) 306-9515 for honest guidance on your specific system.
Get Furnace Repair That’s Priced in Writing Before It Starts
If your furnace isn’t heating Lake Mary’s 40-degree winter mornings the way it should, don’t wait for the next cold snap to prove it. Call Dalton Heating & Air at (361) 306-9515 for a free estimate on furnace repair. We’ll give you a written price, a clear diagnosis, and a one-year written guarantee on the work. Marco Benitez and the team at Dalton follow The Garrison Code on every call: show up inside the window, price it in writing, do it right, leave it clean, and stand behind it for a full year.
Written by Marco Benitez, Owner at Dalton Heating & Air.