“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
Treasure Coast HVAC Service
Boat AC Not Cooling — Dockside Diagnostic
When a boat AC quits cooling, the cause is usually one of four things: seawater flow is restricted, refrigerant is low, the compressor or pump has failed, or the control board has faulted. We diagnose all four in one dockside visit and quote the repair in writing.
License # CAC1824400 5.0 · 37 Google Reviews Port St. Lucie · Fort Pierce · Stuart · Vero Beach
Why Treasure Coast Trusts Us
Reasons Homeowners & Captains Pick Maritime Air Co.
5-Star Rated
Verified Google reviews
Licensed & Insured
Class-A CAC1824400
Family Owned & Operated
Treasure Coast residents
Residential · Commercial · Marine
Full-spectrum HVAC
Written Estimates
Approved before work begins
Photo-Documented Work
Warranties registered for you
Chamber of Commerce
St. Lucie County member
Why Maritime Air Co.
What You Get With Our Boat AC Not Cooling Diagnostic Service
Seawater Flow Check
Strainer, pump, through-hull, and coil scaling all verified before assuming a refrigerant or compressor problem.
Refrigerant Verification
Pressure check and leak inspection with proper EPA 608 recovery if needed.
Control Board Diagnostics
Cruisair SMX, Dometic Passport, Webasto, and Mabru control diagnostics on every common system.
Coil & Capacity Check
Heat-transfer measured at the coil to confirm whether the unit is actually moving the BTUs it should.
Honest Quote
Repair vs. replace recommendation with line-item pricing in writing before any work starts.
Same-Day Dockside
Diagnostic to repair quote in one visit at most Treasure Coast marinas.
Our Process
How Boat AC Not Cooling Diagnostic Works With Us
01
Verify Flow
Seawater pump output and through-hull discharge confirmed first.
02
Check Refrigerant
Pressures and superheat measured against spec.
03
Test Controls
Fault codes pulled and control programming verified.
04
Quote
Repair plan in writing with parts, labor, and timing.
FAQ
Boat AC Not Cooling Diagnostic Questions, Answered
Why does my boat AC blow warm even though the unit is running?+
Almost always restricted seawater flow — strainer, pump, or scaled condenser coil. We verify flow before condemning any expensive component.
Can you fix it the same day?+
Many failures yes — pumps, capacitors, control boards, and refrigerant work are commonly same-day at the dock. Full unit replacements are scheduled separately.
What affects diagnostic cost?+
Vessel location, system complexity, and access to the unit. We quote the diagnostic fee in writing before dispatch and apply it toward repair if you authorize the work.
Reviews
Boat AC Not Cooling Diagnostic — Customer Reviews
What Treasure Coast homeowners, businesses, and captains say about Maritime Air Co.
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
Ready for Boat AC Not Cooling Diagnostic?
Free phone diagnostic. Same-day service across the Treasure Coast. No upsells, no overtime fees on maintenance plans.