Frequently Asked Questions

We're based in Derby and serve the entire Wichita metro — including Wichita, Andover, Augusta, Haysville, Mulvane, Goddard, Maize, Valley Center, El Dorado, and 19 more south-central Kansas communities. Not sure if you're in our area? Just give us a call.

MJB Heating & Cooling has been a family-owned, locally operated HVAC company since 1984 — more than 40 years of honest, neighborly service across the Wichita metro.

Yes. MJB is EPA certified, NATE certified, and BBB accredited. Every technician we send is trained, background-checked, and equipped to work safely in your home.

We do — 24 hours a day, 7 days a week. Heat or AC out in the middle of a Kansas heat wave or a winter night? Call us and we'll get a technician headed your way fast.

We're a Daikin Comfort Pro dealer and install and service all major HVAC brands — Daikin, Trane, Carrier, Lennox, Goodman, Mitsubishi, Bosch, Rheem, and more. Our trucks carry common parts so most repairs are handled in a single visit.

In most cases we can have a technician at your door the same day — often within a few hours. Emergencies jump to the front of the line.

We'll explain any service-call or diagnostic fee up front before any work begins. You'll always approve the price before we start — no surprises on the invoice.

It depends on the age of your equipment, the cost of the repair, and how efficiently it's running. As a rule of thumb, if your system is more than 10–15 years old and facing a major repair, replacement often saves money long-term. Our technician will lay out the honest options so you can decide.

Most repairs are completed during the first visit. If a specialty part has to be ordered, we'll tell you the timeline and do everything we can to keep you comfortable in the meantime.

We recommend two tune-ups a year — one in spring for your AC and one in fall for your heating. Seasonal maintenance keeps efficiency high, catches small issues before they become breakdowns, and protects your manufacturer warranty.

Our plans include seasonal tune-ups, priority scheduling, discounts on repairs, and waived fees on higher tiers. See our maintenance plans for a full comparison.

Yes. A clean, properly tuned system doesn't have to work as hard to heat or cool your home, which means lower monthly energy costs and a longer equipment lifespan.

We do. We offer flexible options including 9 Months Same As Cash and low monthly payment plans on qualifying installations and major repairs. See our financing page for details, then apply in minutes.

Always. We quote flat, upfront pricing before any work starts — so you know exactly what you're paying and can make the call with confidence.

Yes — estimates on new system installations are free. We'll assess your home, walk you through the right-sized options, and give you a clear written quote.