HVAC Motor Not Running Properly? Rotom Motor Run Capacitor 36-10-370440 — Restore 10MFD Run Capacitance Fast
A failed motor-run capacitor is one of the most common reasons an HVAC fan or compressor motor hums, struggles to reach operating speed, or trips on thermal overload. The run capacitor maintains the phase shift required to keep the motor spinning efficiently under load. When it fails, the motor draws excessive current, overheats, and either refuses to run or shuts off on the overload protector.
⚡ Common failure point in residential and light-commercial HVAC condensing and air-handling units.
Part 36-10-370440 is the Rotom specification-based replacement rated at 10MFD and 370/440 VAC that may restore proper motor-run support when testing confirms the original capacitor is defective and no related motor or electrical fault remains.
❓ Is This the Right Part?
This is the correct specification match if ALL of the following are true:
- ✔ Your original capacitor is rated exactly 10MFD — capacitance must match exactly
- ✔ Your original capacitor is rated 370V or 440V — a 440V replacement may replace a 370V original when capacitance matches; the reverse is not permitted
- ✔ Your mounting space accommodates an oval capacitor body approximately 2.03" wide × 1.24" deep × 3.15" high with quick-connect blade terminals
- ✔ Testing confirms the original capacitor is defective and no related wiring, motor, contactor, or electrical-supply fault remains
Not sure? Send us your capacitor label specs — we'll confirm before you order.
🔧 Common Symptoms of a Failed Motor-Run Capacitor
- Fan or compressor motor hums but fails to start or reach operating speed
- Motor starts then shuts off on thermal overload shortly after
- Motor runs hot or draws higher-than-normal amperage
- Capacitor body visibly bulged, leaking, or reads out-of-tolerance on a capacitance meter
✔ If these symptoms match and capacitor testing confirms a defective reading, this is the most likely failed component.
✔ Similar symptoms can also result from damaged wiring, a defective motor, contactor problems, or an incorrect power supply — confirm the capacitor is the root cause before ordering.
📦 Part Details
- Part Number: 36-10-370440
- Supersedes: 10-370440
- Brand: Rotom / AllTemp — New
- Type: Single-Value Oval HVAC Motor-Run Capacitor
- Capacitance: 10MFD / 10 µF
- Voltage Rating: 370/440 VAC (dual-voltage)
- Shape: Oval
- Dimensions: 2.03" W × 1.24" D × 3.15" H
- Terminals: Quick-connect blade terminals
- Frequency: 50/60 Hz
- Features: Built-in pressure interrupter, UL and cUL Recognized
- GTIN: 777980032986
🔄 Also Replaces These Part Numbers
Direct oval replacements (10MFD, 370/440V, oval):
10DV (Rotom alternate), TOCF10 (Titan Pro / Packard), POCF10 (Titan HD / Packard), POCF10A (Titan HD HD), 12932 (MARS / JARD), 14032 (MARS USA), 12032, 12132, CR10X440 (Supco), LCR10X440 (Supco Linebacker), PPS10440OV (ProParts), PPHD10440OV (ProParts HD), 45100H (DiversiTech), 45100HU (DiversiTech HD), TP10440 (TradePro), TP10440UO (TradePro HD), 325P106H44A30N4X (Packard predecessor)
Electrical equivalents — round shape (confirm mounting fit before ordering):
36-10R3744 (Rotom round), 14232, CR10X440R (Supco), LCR10X440R (Supco Linebacker), PPS10440RD (ProParts), PPHD10440RD (ProParts HD), PRCF10 (Packard), PRCF10A (Packard HD), TP10440R (TradePro), TP10440U (TradePro HD) — same 10MFD and 440V electrical rating; round case requires confirmation that mounting strap and cabinet space can accommodate the different shape.
Inspect the motor windings and bearings while the unit is open. A failed run capacitor often causes secondary heat damage to motor windings — replacing only the capacitor on a heat-stressed motor may result in repeat failure within one season. If the motor shows signs of overheating or bearing wear, replace both components at the same service call.
⚙️ Installation
Skill Level: Advanced — Qualified HVAC Technician Required. Disconnect and lock out all power to the unit before opening the electrical compartment. HVAC capacitors can retain a hazardous electrical charge after power is disconnected — discharge the capacitor safely using an insulated resistor before handling. Photograph the original wiring before disconnecting. Note terminal labelling, connect the replacement to the same terminals, and confirm all connections are secure before restoring power and testing motor operation.
✓ Specification Compatibility
This capacitor is compatible with any HVAC motor application requiring a single-value oval motor-run capacitor rated at exactly 10MFD and 370V or 440V, provided the oval body (2.03" W × 1.24" D × 3.15" H) and quick-connect blade terminals fit the existing mounting and wiring configuration. Compatibility is determined by electrical specification and physical fit — not by equipment model number. Contact us with your original capacitor label before ordering if you are unsure.
💡 Pro Tip
A standard multimeter cannot accurately measure capacitance. Use a dedicated capacitor tester or a multimeter with a capacitance function to confirm the original capacitor is reading outside the ±5% tolerance before condemning it. A capacitor reading within tolerance is not the cause of the motor problem — look further before ordering a replacement.
✅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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