HVAC Repair Frankfort IL | Call D & T Service

Frankfort, IL 60423

(815) 485-7400

Business Offerings

  • HVAC installation or replacement
  • HVAC system repair
  • HVAC system maintenance

Questions and Answers

What should I do if my furnace won't ignite on a cold Frankfort morning?

A furnace ignition failure is a common winter issue here. First, check your thermostat settings and ensure the circuit breaker hasn't tripped. If those are fine, it's best to call a professional. D & T Service has been handling these precise problems for Frankfort residents since 1978. Our technicians can quickly diagnose whether it's a faulty igniter, flame sensor, or gas valve issue. We carry parts for most makes and models and guarantee our repairs, so you can get your heat restored reliably.

How often should I schedule maintenance for my HVAC system?

For optimal performance and efficiency, we recommend scheduling professional HVAC maintenance twice a year—once in the spring for your air conditioner and once in the fall for your furnace. This regular check-up helps catch small issues before they become major repairs, extends the life of your equipment, and keeps your energy bills in check. As a local family-owned business, we offer maintenance plans to make this process easy and affordable for homeowners in Frankfort and the surrounding South Suburbs.

What are the signs that my AC unit might have a refrigerant leak?

Common signs include your AC system blowing warm air, ice forming on the refrigerant lines or outdoor unit, a noticeable hissing or bubbling sound, and a sudden spike in your cooling bills. Refrigerant leaks reduce efficiency and can damage the compressor. Since 1978, D & T Service has been expertly diagnosing and repairing these leaks for local homeowners. We'll locate the source, repair it properly, and recharge the system to the manufacturer's specifications, ensuring your home stays cool and comfortable.

Business Profile

D & T Service is a family-owned and operated HVAC provider that has been a trusted resource for Frankfort, Manhattan, New Lenox, Mokena, and Tinley Park homeowners since 1978. We specialize in making indoor comfort reliable and affordable, offering guaranteed work on all makes and models. Our comprehensive services include heating and air conditioning installation, repair, and maintenance, along with boiler repairs, hot water heaters, refrigeration, and air quality solutions like humidifiers and electronic air cleaners. As a local business, we understand the specific climate challenges our neighbors face and are committed to providing prompt, dependable service. We invite you to call for a free estimate on new equipment and experience the difference that comes with over four decades of community-focused care.

Business Location & Hours



Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours


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