“Scheduling air quality solutions was a breeze, and they arrived on time near Three Creeks. Very pleased with MJM HVAC!”
Brian C.Three Creeks
VerifiedWhen you need same-day ductless circuit board replacement in Augusta, MJM HVAC is your trusted choice. Our certified technicians bring extensive experience, tailored to the unique needs of St. Charles County residents. We provide a clear flat-rate quote before any work begins, ensuring transparency and peace of mind.
Licensed · Upfront options · Clean work areas · Written guarantees
These are our most frequently served ZIP codes. Nearby areas may also qualify—call if you do not see yours.
Gray Summit · Three Creeks · Defiance · Villa Ridge · Washington · Pacific · New Melle · Marthasville · Union · Wildwood · Lake Tekakwitha · Eureka
Gray Summit · Three Creeks · Washington · Villa Ridge · Defiance · All Missouri cities
“Scheduling air quality solutions was a breeze, and they arrived on time near Three Creeks. Very pleased with MJM HVAC!”
Brian C.Three Creeks
Verified“Got an honest quote for my ductless mini split system, and no surprise fees. Great job from MJM HVAC in Augusta!”
Tyler B.Augusta
Verified“After another company couldn't fix my Mini Split, MJM HVAC stepped in near Gray Summit. They solved the maintenance issues with ease!”
Robert H.Gray Summit
VerifiedA real dispatcher is available if your question is not answered here.
Call 8334920770 →Most Augusta calls are scheduled the same day, with 24/7 emergency response across St. Charles County.
We quote a flat rate up front - typically in the range shown below - and you approve it before we begin.
Call now for fast, licensed Mini Split AC Repair anywhere in Augusta and St. Charles County.