Finding a reliable Hvac Maintenance contractor in Old Lyme, CT is harder than it should be. FH HVAC makes the standard clear: written pricing, active CT licensing, live dispatch 24/7, and a 90-day parts and labor guarantee on every job.

If you've dealt with contractors in Old Lyme, CT who gave you a verbal estimate and handed you an invoice that didn't match — or sent someone who clearly wasn't CT licensed — you know exactly why the bar feels low in this market.
FH HVAC operates on a different standard in Old Lyme, CT. Every technician we send holds an active CT license, NATE certification, and a current EPA 608 refrigerant credential. Every quote is written and itemized before any work starts. Every completed job carries a 90-day guarantee documented on your invoice. Calling +1-844-586-3138 at any hour connects you to a real person who confirms your ETA before you hang up.

Licensed, insured, and guaranteed. Every service below is available in Old Lyme, CT right now.
Your HVAC system quit in Old Lyme, CT and you need someone right now. Calling +1-844-586-3138 connects you to a live dispatcher who routes a CT-licensed technician toward your address immediately — not a callback promise. Our trucks carry the parts most common in Old Lyme, CT's HVAC systems, so first-visit repairs are the standard, not the exception.
Old Lyme, CT Emergency: +1-844-586-3138From a full system replacement to a targeted repair in your Old Lyme, CT home, our residential technicians don't guess system size. Every installation starts with a proper Manual J load calculation — the step that prevents the common mistake of oversizing, which causes short-cycling and early system failure. All CT permits pulled. Parts and labor both warranted.
Book a Old Lyme, CT technicianA failed HVAC system in your Old Lyme, CT office, retail location, or commercial facility means real money lost. Our commercial team handles rooftop units, large split systems, VRF and chiller work across Old Lyme, CT — coordinated around your operating hours to minimize disruption. Priority response for commercial service agreement clients.
Commercial HVAC in Old Lyme, CTYour Old Lyme, CT home's indoor air quality challenges depend on local seasonal patterns. We install HEPA filtration upgrades, UV germicidal systems, dehumidifiers, humidifiers, and ERVs configured for this region's conditions. Most impactful for households managing asthma or recurring respiratory conditions.
Indoor air quality: +1-844-586-3138More Old Lyme, CT homeowners are choosing heat pumps and ductless systems for additions, garages, and conversions where running ductwork through existing walls isn't practical. Our Old Lyme, CT technicians are factory-trained on all major brands — Mitsubishi, Daikin, Fujitsu, LG, Bosch — and handle everything from initial installation through refrigerant service.
Ductless install: +1-844-586-3138Consistent preventive maintenance is the single biggest factor in how long an HVAC system lasts — and most Old Lyme, CT homeowners underinvest in it. Two tune-ups annually, priority dispatch year-round, 15% off parts and labor, refrigerant checks, coil cleaning, and a written condition report every visit.
Plan details: +1-844-586-3138Four steps. No surprises. That's the whole model.
Real person answers. Not voicemail. You get an ETA for Old Lyme, CT before you hang up.
We dispatch from the closest available tech to your Old Lyme, CT location. Every credential verified before they arrive at your door.
After diagnosing your system in Old Lyme, CT, your technician hands you a written, itemized quote. The number you sign is the number on your invoice. We never add charges after work is complete.
The job gets done and backed by a 90-day parts and labor guarantee documented on your invoice.
Operating standards, not slogans. Everything on this list is policy at FH HVAC in Old Lyme, CT.
What you approve is what you pay. Always. No post-job surprises in Old Lyme, CT.
Every FH HVAC technician in Old Lyme, CT carries an active CT contractor license. Ask for documentation before any contractor starts work on your system.
Regional technician positioning throughout Old Lyme, CT keeps response times under 60 minutes in most markets — including during peak summer and winter demand.
Every Old Lyme, CT repair we complete carries a 90-day parts and labor guarantee printed on your invoice. If it fails, we return at no charge — no debate required.
Not voicemail. Not a bot. A live dispatcher who has a technician moving toward your Old Lyme, CT address within minutes.
"I asked for proof of CT licensing before letting anyone in. Two contractors couldn't produce it. FH HVAC sent documentation in under two minutes."
— Old Lyme, CT homeowner, new system installation"Called FH HVAC in Old Lyme, CT on a Saturday afternoon, had a tech at the door in under an hour, written quote before they started, invoice matched the quote exactly. I've never had an easier contractor experience in Old Lyme, CT."
"Old Lyme, CT commercial HVAC emergency on a Friday. FH HVAC had someone there fast, correctly diagnosed a failed capacitor, and had the system running before the event was compromised. Exceptional response time for a commercial call."
"The FH HVAC maintenance plan in Old Lyme, CT found a developing refrigerant leak at our annual spring check. They fixed it at the plan rate. I did the math — fixing it in July as an emergency would have cost significantly more. The plan pays for itself."

FH HVAC covers all of Old Lyme, CT with licensed technicians, written upfront pricing, and live 24/7 dispatch. One call. Real ETA. No runaround.
📞 Call +1-844-586-3138 — Old Lyme, CT Live Dispatch