Trane Furnace Error Code 87: How to Fix It

Q: What causes Trane error code 87?

Error code 87 is typically caused by a failed dual run capacitor, worn motor windings, debris blocking the fan blade, or loose electrical connections to the outdoor fan motor.

Q: Can I run my Trane furnace with error code 87?

No, you should not continue operating the system with error code 87. A faulty outdoor fan motor can cause the system to overheat, leading to compressor damage and more expensive repairs.

Q: How much does it cost to fix Trane error code 87?

DIY repairs typically cost $20-80 for a capacitor or $150-300 for a fan motor. Professional repair costs range from $200-500 depending on the required parts and labor rates in your area.

Q: How often should I replace my outdoor fan motor capacitor?

Dual run capacitors typically last 10-15 years but may fail sooner in extreme climates. Replace capacitors preventively every 10 years or when they test outside their rated range.

Abstract

Trane furnace error code 87 indicates an outdoor fan motor fault, typically caused by a faulty capacitor or damaged motor windings. This error prevents your heat pump's outdoor unit from operating properly, affecting both heating and cooling efficiency.