“My highest recommendations for Devon and the Maritime Air team — thorough, honest, and on time. They explained everything in plain language and didn't push any unnecessary upsells.”
Spencer Fuller
May 2026
Carrier Infinity Repair
Carrier Infinity Communicating System Repair
The Carrier Infinity platform is a communicating system — the thermostat, air handler, condenser, and zoning board all talk over a 4-wire (R/C/A/B) bus. When one device drops off the bus, the whole system can refuse to run. Most non-Carrier dealers don't have the diagnostic training or the Carrier Service Tool II to diagnose Infinity properly. We do.
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Infinity-specific issues we diagnose
Infinity faults look different from a standard 24V system. The thermostat usually shows a numeric code (like 178, 184, 45) that points straight to the failed component — once you know how to read them.
- Code 178 / 184 — communication fault between thermostat and outdoor
- Code 45 — control box failure
- Code 110 — low pressure switch open
- Code 173 — outdoor temperature sensor fault
- Infinity Touch thermostat black screen or unresponsive
- Variable-speed compressor refusing to ramp past stage 1
- Zoning board (SYSTXBBSAM01) bypass damper hunting
- ECM blower motor module communication loss
Why Infinity systems need a Carrier dealer
Replacement parts on Infinity (control boards, communicating sensors, Infinity thermostats) are dealer-only. A generic 24V thermostat will not run an Infinity system. If a non-dealer tells you they can substitute a Nest or Ecobee for your broken Infinity Touch, they're going to take you out of variable-speed and zoning permanently.
Reviews
What Treasure Coast Customers Say
5.0
37 Google Reviews
Google
“Devon has provided thorough maintenance and excellent service. Truly family-owned care — they treat your home like it's their own. Highly recommend for Treasure Coast homeowners.”
Oh Canada
March 2026
“Working with Devon on my HVAC system was a great experience from start to finish. Fair, clean install, and the system has been running perfectly through Florida summer heat.”
David Alker
February 2026
Our Work
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FAQ
Common Questions
My Infinity Touch thermostat is showing a code — what does it mean?+
Codes 178/184 are communication faults (loose A/B wire is the #1 cause). Code 45 is a control box failure. Send us a photo of the code and we'll tell you the part and the typical repair range before we roll the truck.
Can I replace my broken Infinity Touch with a Nest?+
Only if you give up variable-speed, communicating zoning, and Infinity Air Purifier control. We don't recommend it. A replacement Infinity Touch runs $450–$700 installed and keeps the system fully featured.
Why won't my Infinity ramp into 2nd stage anymore?+
Usually a communication fault, a sensor fault, or the outdoor inverter board. Infinity will fall back to single-stage 'safe mode' rather than fail completely — which is why people don't notice until their electric bill jumps.
Ready when you are.
Call (772) 236-4277 or schedule online. Class-A licensed across the Treasure Coast.