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Trane Gas furnace A951X040BD3SA

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Trane Trane AHRI Furnace - RunTru by Trane A951X 95% Gas Furnace Gas furnace Repair, maintenance, and replacement planning
Trane A951X040BD3SA product image

Technical Specifications

Product Specs

  • AHRI unit role: Furnace
  • AHRI model/pattern: A951X040BD3SA
  • AHRI records represented: 1
  • AHRI equipment type: HP - Split System
  • AHRI refrigerant: R-454B
  • Verified catalog model: A951X040BD3SA
  • Verified product family: RunTru by Trane A951X 95% Gas Furnace
  • Verified catalog brand: Trane
  • Verified model family: A951X
  • AHRI furnace model/pattern: A951X040BD3SA
  • Base furnace model: A951X040BD3SA
  • Nominal input: 40,000 BTU/h
  • AFUE: up to 96%
  • Heating stages: single-stage
  • Blower: constant-torque ECM
  • Combustion: condensing gas furnace
  • Configuration: downflow
  • Blower tonnage: 3 ton
  • Cabinet width: 17.5 in.
  • Dimensions: 34 in. H x 17.5 in. W x 28.8 in. D
  • Application: matched gas furnace for split-system air conditioner or heat pump combinations
  • Public RunTru by Trane product page: https://runtruhvac.com/furnaces/

Useful troubleshooting details

  • Confirm the installed model and serial number, matched indoor or outdoor equipment, voltage, refrigerant, controls, and AHRI certificate before service or replacement planning.
  • Use the linked AHRI certificates to verify matched-system combinations, rebate conversations, and equipment eligibility before quoting replacement work.
  • Collect photos of the nameplate, equipment access, recent fault history, and comfort symptoms before dispatch or proposal planning.

Troubleshooting

Error Codes

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E01 Integrated furnace control

Internal control failure

Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
E2.1 Ignition and flame sensing

Retry exceeded; flame never sensed

Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
E2.2 Ignition and flame sensing

Recycles exceeded; established flame was lost

Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
E2.3 Gas valve control

First-stage gas valve not energized when expected

Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
E3.1 Pressure switch circuit

Shorted first-stage pressure switch

Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
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Certification match

AHRI certificates

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ENERGY STAR certified HP - Split System

AHRI 218469603

AHRI 218469603 identifies a Mass Save qualified HP - Split System from Trane with outdoor unit N5HP5036A1 and indoor unit 5PX*BD06AS3+TSTAT.

Service planning

How GreenFlow handles A951X040BD3SA requests

1

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.

2

Describe the service issue

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

3

Review access and history

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

4

Plan the next step

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

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John F.

I needed 2 new AC units and decided to go with high efficiency heat pumps. I chose Greenflow because of the equipment they offered, and the price (2nd lowest quote and much cheaper than the average of all quote we received). Their technicians were very detail oriented and...

Michael C.

always available, easy to get a hold of, as a property manager I get lots no heat emergency, usually get to it same day or next day

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.

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...

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