★★★★★
“The technician from MJM HVAC provided exceptional service with my thermostat installation and repair, making sure I understood the new system in St. Marys.”
LH
Luis H.St. Marys
Verified4.7 ★Average rating
13,983+Jobs done
24/7Emergency service
Licensed · Upfront options · Clean work areas · Written guarantees
ST. MARYS
AREA
MMMMMAREA
Primary St. Marys response zone
St. Marys service coverage
Is your ZIP on the route?
These are our most frequently served ZIP codes. Nearby areas may also qualify—call if you do not see yours.
45885
Popular neighborhoods
New Knoxville · New Bremen · Buckland · Celina · Montezuma · Chickasaw · Kettlersville · Minster · Wapakoneta · Maria Stein · Mendon · Spencerville
Nearby cities
Check my address →New Knoxville · New Bremen · Celina · Chickasaw · Buckland · All Ohio cities
Reviews
What St. Marys Customers Say
4.9★★★★★verified reviews
★★★★★
“I needed a quick repair for my Mini Split AC, and MJM HVAC came through. They provided a fair, upfront price and had the issue resolved the same day - couldn't be happier!”
AP
Angela P.St. Marys
Verified★★★★★
“Thanks to MJM HVAC, my condenser cleaning was successful the first time, and they knew exactly how to handle the specifics of St. Marys installations.”
DK
Diane K.St. Marys
Verified More Services
Other services in St. Marys, OH
01Mini Split AC InstallationExperience Same-day Mini Split AC Installation i↗02Mini Split AC RepairSame-day Mini Split AC Repair in St. Marys, hand↗03Mini Split AC MaintenanceSame-day Mini Split AC Maintenance in St. Marys,↗04Mini Split AC ReplacementFast Mini Split AC Replacement in St. Marys, han↗05Ductless Mini Split SystemsReliable Ductless Mini Split Systems in St. Mary↗
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