True Refrigerator Running Warm or Icing Over? Evaporator Fan Motor 4201940 – Fix It Fast
A failed evaporator fan motor is the most common cause of a warm cabinet, excessive frost buildup, and uneven temperatures in True commercial refrigerators. In True 700-series reach-in units, the evaporator fan circulates cold air from the evaporator coil throughout the cabinet — when the motor fails, airflow stops, the coil ices over, and product temperatures rise rapidly. ⚡ Common failure point in True-built 700-series commercial refrigerators and freezers. Part 4201940 is the genuine OEM replacement motor assembly that restores proper evaporator airflow and cabinet temperature control immediately.
⚠️ Important Note for Model 700TC/I: For units with a serial number prior to #1397040, also order Sump Cover Part #4151900 — required for correct installation on early-production units.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Your True refrigerator/freezer powers on and the compressor runs
- ✔ The condenser fan (exterior) is operating normally
- ✔ Refrigerant charge is confirmed OK (no hissing, no oil staining at fittings)
- ✔ The defrost system is functional or has been recently serviced
- ✔ ONLY problem is warm cabinet, heavy frost on the evaporator coil, or no airflow inside the cabinet
Not sure? Send us your model number — we'll confirm before you order.
🔧 Common Symptoms
- Cabinet temperature rising above setpoint — product at risk
- No airflow felt inside the cabinet when door is opened
- Evaporator coil completely iced over or frosted solid
- Fan motor humming but blade not spinning (seized bearing)
- Fan motor completely silent — no hum, no rotation
- Intermittent cooling — unit cools then warms in cycles
✔ If these symptoms match, a failed evaporator fan motor is the most likely cause.
✔ In most cases, replacing motor assembly 4201940 restores proper cabinet temperatures within one full refrigeration cycle.
📦 Part Details
- Part Number: 4201940
- SKU: A025703G
- Type: Evaporator Fan Motor Assembly
- Replaces: OEM direct-fit evaporator fan motor — no modification required
- Brands: True Refrigeration
- Fits Series: 700TC/I, 700TR, 700TF/I, 700BR, 700BF/I, 700BR-2, 700BF/I-2, 700BC/I-3, 700BF/I-3
While the evaporator panel is open, inspect the defrost heater and defrost thermostat — these components are stressed by the same icing conditions that kill the fan motor and are inexpensive to replace at the same time. For 700TC/I units prior to serial #1397040, also order Sump Cover #4151900 before beginning installation.
⚙️ Installation
Skill Level: MODERATE — 30–45 minutes. Disconnect the unit from power and allow the evaporator coil to fully defrost before beginning. Remove the interior evaporator panel to access the fan motor, disconnect the wiring harness, unbolt the old motor from the mounting bracket, and install the new 4201940 assembly in reverse order. Verify the fan blade spins freely without contacting the shroud before restoring power and confirming cabinet temperature recovery.
✓ Compatible Models
Confirmed compatible with True 700TC/I, 700TR, 700TF/I, 700BR, 700BF/I, 700BR-2, 700BF/I-2, 700BC/I-3, 700BF/I-3 series units. Contact us to verify your model number before ordering.
💡 Pro Tip
A fully iced evaporator coil can block the fan blade and mimic a dead motor — always run a manual defrost cycle first and let the coil clear completely before condemning the fan motor. If the motor runs normally after defrost, the root cause is a failed defrost heater or thermostat, not the fan. Replacing the wrong part wastes time and money on a commercial unit.
Find all parts for your unit: 700TC/I, 700TR, 700TF/I, 700BR, 700BF/I, 700BC/I-3
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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