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Hutchinson Island · Treasure Coast
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

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

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
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
Google

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
Google

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.

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