Fan coil

Payne Fan coil FMU5X Ceiling Uncased Fan Coil

Schedule Service Check Availability

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

Technical Specifications

Product Specs

Brand: Payne
Official model: FMU5X
Official product name: Ceiling Uncased Fan Coil
Product category: fan-coils
Uses R-454B refrigerant which continues our legacy of dedication to environmental stewardship. This refrigerant achieves a remarkable 75% reduction in global warming potential while preserving the non-ozone depleting properties of our previous refrigerant.
Includes factory-installed refrigerant leak dissipation systems to meet new UL requirements and to show our commitment to safety.
Efficiency-optimizing Thermostatic Expansion Valve (TXV)
Corrosion-resistant all-aluminum coil
Insulated to help reduce cabinet sweating
10-year parts limited warranty*
Horizontal ceiling mount
Designed for ceiling installation
Compatible thermostat: two-stage heat/one-stage cool
Capacity: 1.5–3 tons
Official source: Payne product page
Model or series: FMU5X 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: payne.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 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

Sharad W.

Green Flow and the people who work there are terrific. Vlad and Andre are excellent. Andre was very helpful. He was punctual, respectful, efficient and knowledgeable. He did not try to sell me something I didn’t need ( as others have done before). I was charged $99 which...

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.

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Jack B.

Andrey always does a great job.

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