Fan coil

Comfortmaker Fan coil FMU5X Performance Ceiling Uncased Fan Coil

Schedule Service Check Availability

Comfortmaker Residential HVAC Fan coil Repair, maintenance, and replacement planning

Technical Specifications

Product Specs

Brand: Comfortmaker
Official model: FMU5X
Official product name: Performance Ceiling Uncased Fan Coil
Product category: fan-coils
Fan Speed = 3-Speed Fan
Timely registration required for 10-year parts limited warranty. Limited warranty period is 5 years if not registered within 90 days of installation. Jurisdictions where warranty benefits cannot be conditioned on registration will receive the registered limited warranty periods. Please see warranty certificate for further details and restrictions.
Includes factory-installed refrigerant leak dissipation systems to meet new UL requirements and to show our commitment to safety.
3-speed fan blower
All aluminum coil for enhanced corrosion resistance
Optional electrical heat kit available as an accessory.
Efficiency-optimizing Thermostatic Expansion Valve (TXV)
Horizontal ceiling mount
Fully insulated to help reduce cabinet sweating
10-year parts limited warranty*
Thermostatic Expansion Valve (TXV) (when cased)
Designed for ceiling installation
Compatible thermostat: two-stage heat/one-stage cool
Lower global warming potential R-454B refrigerant
Capacity: 1.5–3 tons
Official source: Comfortmaker product page
Model or series: FMU5X Performance Ceiling Uncased Fan Coil
Equipment type: Fan coil
Product group: Residential HVAC
System role: Indoor evaporator coil for a matched split HVAC system
Application: Residential, light-commercial, or managed-property comfort applications
Compatibility check: Match with compatible outdoor equipment, controls, airflow, voltage, and capacity before service or replacement.
Verified source: comfortmaker.com

Useful troubleshooting details

Confirm the exact FMU5X Fan coil model number, serial number, capacity, voltage, refrigerant or fuel type, controls, and matched equipment.
Share current symptoms, alerts or error codes, recent maintenance, access notes, and whether the issue is urgent or planned.
For replacement planning, note comfort goals, existing equipment age, and any heat-pump, electrification, or rebate-related questions.

Service planning

How GreenFlow handles FMU5X Performance Ceiling Uncased Fan Coil requests

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Our Happy Customers

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

Melissa S.

The repair person came quickly and was super efficient and polite, and showed me what to do next time. He gave my dog a quick pay and was off again.

Neal V.

In an industry that often fraught with contractors taking advantage of homeowners, Andrey was honest with his assessment and willing to install a product acquired elsewhere (most want that margin themselves), patiently answered my questions (I’m an engineer so like to understand what’s happening), and proactively offered practical...

Anna G.

They quickly identified the issue with the heating system and fixed it efficiently. He explained everything clearly and made sure I understood what was going on. Very professional and reliable, extremely satisfied with the service.

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