Del-Air Heating, Air Conditioning, Plumbing and Electrical Logo

HVAC Troubleshooting in Greater Orlando Area

Get fast, accurate HVAC troubleshooting without the guesswork. Our licensed, bonded, and insured technicians find the root cause and fix it right. Serving the Greater Orlando Area, including Orlando, Winter Park, and Sanford. Backed by a 4.6 rating from 5,861 reviews and in business since 1983. Same-day service with upfront options and friendly financing. As summer heat builds, stay comfortable with expert diagnostics. Call or book online today.

Our work

Project Gallery

Trust Del-Air Heating, Air Conditioning, Plumbing and Electrical for prompt, professional HVAC maintenance that keeps your home comfortable and efficient.
Why us

Why Choose Us

Licensed and insured techs

License #EC13013085 #CAC1822274 #CAC051477 #CFC057524

Since 1983 experience

Serving Florida homeowners since 1983

Same-day and 24/7 help

Same-day service and 24/7 emergency support

Upfront pricing options

Free estimates and flexible payment plans

Proven customer satisfaction

4.6 rating from 5,861 reviews

Social proof

What Our Customers Say

5.0
professionalism

“Techs did a great job troubleshooting problem with A/C and offered a workaround.”

5.0
speed

“Greg Swan did an excellent job troubleshooting our issue and resolved it quickly.”

5.0
quality

“He diagnosed the issue quickly and resolved it promptly. Very thorough.”

Got questions?

Frequently Asked Questions

Common thermostat problems that stop it from working include loss of power, loose thermostat connections, and HVAC control-electrical failures. The most common cause we see is a tripped breaker that cuts power to the air handler or control circuit, which makes the thermostat appear unresponsive.

Our technicians frequently diagnose these issues in the DeLand Southwest area and explain repair options with upfront pricing before work begins. Same-day and 24/7 emergency service is available if comfort can’t wait.

Watch for these specific causes:

  • Tripped breaker removing 24V control power to the system
  • Loose or damaged thermostat wiring or wall-plate connection
  • Electrical component failure in the control circuit preventing communication
  • A clogged condensate drain triggering a safety switch, which can look like a dead thermostat

If basic checks don’t restore function, avoid repeated power cycling and book a professional diagnosis to prevent additional damage.

Updated: 2026-06-22

Need help in DeLand Southwest, FL? Call (407) 768-4694 or book online.

Where we work

Service Areas We Cover

Orlando

FL

Pine Hills

FL

Alafaya

FL

Altamonte Springs

FL

Apopka

FL

Clarcona

FL

DeLand

FL

Deland

FL

Deltona

FL

Longwood

FL

Winter Park

FL

Azalea Park

FL

Casselberry

FL

Edgewater

FL

Edgewood

FL

Eustis

FL

Fairview Shores

FL

Holden Lakes

FL

Lockhart

FL

Maitland

FL

Orlovista

FL

Oviedo

FL

Sanford

FL

Wekiwa Springs

FL

Belle Isle

FL

Bithlo

FL

Conway

FL

De Leon Springs

FL

DeBary

FL

Debary

FL

Eatonville

FL

Fern Park

FL

Forest City

FL

Goldenrod

FL

Gotha

FL

Lake Mary

FL

Mid Florida

FL

Mount Dora

FL

Oak Ridge

FL

Orange City

FL

Pine Castle

FL

Samsula-Spruce Creek

FL

Sky Lake

FL

South Apopka

FL

Tangerine

FL

Union Park

FL

Winter Springs

FL

Zellwood

FL

Altoona

FL

Black Hammock

FL

Cassadaga

FL

Christmas

FL

Chuluota

FL

DeLand Southwest

FL

Geneva

FL

Glenwood

FL

Heathrow

FL

Holden Heights

FL

Lake Helen

FL

Lake Kathryn

FL

Lake Mack-Forest Hills

FL

Lake Monroe

FL

Midway

FL

Mount Plymouth

FL

North DeLand

FL

Ocoee

FL

Osteen

FL

Paisley

FL

Paradise Heights

FL

Pine Lakes

FL

Pittman

FL

Plymouth

FL

Rio Pinar

FL

Sorrento

FL

Umatilla

FL

West DeLand

FL

Ready when you are

Schedule service today

(407) 768-4694