About Weil-McLain in Utah homes
Weil-McLain has been making cast iron boilers since 1881 and is one of the oldest American boiler brands still in production. It's the brand we see most often in older Utah homes — particularly the cast iron CGa atmospheric units installed throughout Salt Lake City, Ogden, and the established Davis County cities from the 1970s through the early 2000s. We also install and service the current production lines: Eco, Evergreen, ECO Tec, and the remaining Ultra units still in homes.
What sets Weil-McLain apart: the cast iron tradition produced units that just keep running. Many of the 1980s CGa boilers we service still have their original heat exchangers and are in perfectly good operating condition with proper maintenance. The newer condensing mod-cons (Ultra series and the current Eco/Evergreen) take more attention to keep running long, but they're solid American mod-cons when properly maintained.
Weil-McLain models we service
CGa series — atmospheric cast iron
The workhorse. 80-83% AFUE. Atmospheric draft into a masonry chimney. Cast iron sectional heat exchanger that's lasted 30+ years in many homes. Common in older SLC, Ogden, Bountiful, and Salt Lake County homes. We carry section gaskets, pilot assemblies, gas valves, thermocouples, expansion tanks, and pressure-relief valves on the truck.
GV / GV90 — mid-efficiency
The bridge generation between atmospheric and condensing. 84-90% AFUE. Power-vented or direct-vent. Common in homes built 1995-2008. These units are getting old enough that we're seeing a steady stream of GV90 failures — typically draft inducer motors, control boards, or condensate drain issues. Replacement parts are still available but increasingly back-ordered.
Ultra series — first-gen condensing
Weil-McLain's original condensing mod-con line, introduced in the mid-2000s. 92-96% AFUE depending on model. The early Ultra units had some heat exchanger issues that have been resolved in revisions — but the 10-15 year old Ultra units in Utah homes are starting to need attention. Common service items: igniters, flame rods, gas valves, and on some early units, heat exchanger replacement.
Eco / Eco Tec — current generation
The Eco line is what we install today when a customer wants an American-made condensing mod-con. 95%+ AFUE. Improved heat exchanger design over the original Ultra. Refined controls. Smaller footprint. Eco Tec is the wall-hung version; the Eco series includes floor-standing options. Solid choice for residential up through small commercial.
Evergreen — light commercial
Light commercial condensing line. We service these in larger custom homes, multi-family buildings, and small commercial properties. Same maintenance discipline as the Eco residential line — annual combustion analysis, scale management, control verification.
Common Weil-McLain issues we see in Utah
CGa section gasket leaks
The gaskets between cast iron sections deteriorate over decades, eventually weeping water at the joint. Usually fixable by replacing the gasket pack — typically a 3-4 hour job. We carry the gasket sets.
CGa cracked sections
Distinct from gasket leaks. A cracked cast iron section is structural — the section itself has fractured. Diagnosed via smoke test or pressure test. Replacement sections are sometimes available but the labor cost on disassembly and reassembly is significant. Often the math favors a full replacement on older units.
GV90 draft inducer failure
The fan that pushes exhaust through the heat exchanger and out the vent. Common failure on GV90 units after 12-15 years. Diagnosed by the unit firing briefly then locking out on a draft pressure switch fault. Same-visit replacement most of the time.
Ultra heat exchanger condensate corrosion
Some early Ultra models had aluminum heat exchanger issues where acidic condensate degraded the exchanger. Weil-McLain issued service bulletins and updated heat exchanger designs. If we see corrosion on an Ultra heat exchanger, we evaluate whether HX replacement makes sense vs full unit replacement.
Eco igniter and flame rod fouling
Most common Eco service call. The hot-surface igniter and flame rod foul with combustion deposits over time. Annual cleaning addresses it. When ignored, the unit eventually fails to light or starts producing lockout codes. We clean both on every annual maintenance.
Pressure-reducing valve failures
Common across the CGa and GV90 lines. The PRV that maintains system pressure fails over time, allowing pressure to climb or drop unpredictably. We carry replacement PRVs and the related expansion tanks.
"A maintained Weil-McLain CGa from the 1980s is more reliable than most new boilers being installed today. The brand's strength is durability — when you do the maintenance, they don't quit."
When to repair vs replace
The math is the same as any boiler decision (see our repair page for the full framework) but Weil-McLain has some brand-specific considerations:
- CGa under 25 years old: Almost always worth repairing. The cast iron has decades left.
- CGa 25-35 years old with no major HX issues: Repair is usually fine unless a structural component (sections, manifold) has failed.
- CGa over 35 years old needing major work: Replacement math usually wins. Parts increasingly scarce, efficiency is much lower than current options.
- GV90 over 15 years old needing major work: Often time to replace with current Eco line. Conversion is usually straightforward.
- Ultra with HX problems: Case-by-case. If under warranty (10 years on early models, 15 on later), HX may be covered. Outside warranty, replacement often makes sense.
- Eco at any age: Generally worth repairing — they're current production with full parts support.
Service rates
Standard rates apply across all Weil-McLain models. See our boiler repair pricing for the full range. Common Weil-McLain-specific service items:
- Diagnostic + combustion analysis: $129–$189
- CGa pilot/thermocouple service: $220–$380
- GV90 draft inducer replacement: $580–$880
- Ultra/Eco igniter + flame rod: $260–$420
- Section gasket replacement (CGa): $480–$780
- Annual maintenance: $269–$329
Where we service Weil-McLain boilers
All 26 cities. Heavy concentration in older SLC neighborhoods where the CGa series is dense. Full service area list →