What MFD capacitor do I need for my Tempstar AC?

The correct replacement for Tempstar model T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today.

My AC hums but will not start. What part do I need?

An AC that hums but will not start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost needed to start the compressor and fan motors. When it fails, you hear the hum of the motor trying to start but it cannot overcome inertia. Other symptoms include the fan spinning slowly, the AC cycling on and off rapidly, or a visibly swollen or leaking capacitor. Replacement cost: $15 to $80 for the part, DIY in 30 minutes.

Is this capacitor compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar Run Capacitor for T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today

Name: Tempstar Run Capacitor for T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today
Brand: Tempstar
SKU: 1170643-GEN
Price: 24.95 USD
Availability: InStock

SKU: 1170643-GEN Brand: Tempstar

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Overview

This OEM oval run capacitor (part #1170643) is the blower motor run capacitor for the Tempstar T9MPD050F12C2 modulating gas furnace. Rated at 5 MFD and 370 volts, it delivers the phase-shifted current that lets the blower motor start under load and run efficiently throughout the heating and cooling seasons. A run capacitor charges and discharges on every cycle; as it degrades it loses capacitance, causing the motor to draw high amperage, overheat, and eventually fail to start. Watch for a blower that hums without spinning, weak airflow, intermittent no-heat or no-cool calls, or a furnace tripping on its high-limit because air movement has dropped. Swapping the capacitor is a fast, inexpensive repair that restores full blower performance.

Specifications

Spec	Value
OEM Part Number	1170643
Type	Single Run Capacitor, Oval
Brand	Tempstar (ICP / Heil)
Capacitance	5 MFD
Voltage Rating	370 VAC
Mounting	Oval, strap mount
Fit	OEM Replacement

Compatibility

Direct-fit replacement for the Tempstar T9MPD050F12C2 and other ICP, Heil, Comfortmaker, and Tempstar furnaces using an oval 5 MFD 370V blower capacitor. Always confirm the MFD and voltage stamped on your existing capacitor before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter. Discharge the capacitor across its terminals with an insulated resistor before touching.
Access — Remove the furnace blower compartment service panel.
Document — Photograph all wire connections before disconnecting.
Remove — Loosen the oval mounting strap, slide the old capacitor out, and label the leads.
Install — Seat the new capacitor in the strap, reconnect each lead per your photo, and tighten the bracket.
Test — Restore power and confirm the blower starts smoothly and ramps to full speed.

Signs You Need a Replacement

Blower motor hums but will not start spinning
Bulged, leaking, or swollen capacitor casing
Weak or inconsistent airflow from registers
Furnace tripping on high-limit from low air movement

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

Tempstar Run Capacitor for T9MPD...

$24.95

Frequently Asked Questions

Does this Capacitor fit my Tempstar T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today?

Yes. This is the factory-specified OEM capacitor for the Tempstar T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the capacitor on my Tempstar T9MPD050F12C2 — 5 MFD 370V Oval | Ships Today?

Difficulty: Easy (20–30 min)
Step 1: Turn off power at breaker. Step 2: Open condensing unit panel. Step 3: Photograph the old capacitor wiring (Common/Herm/Fan). Step 4: Discharge old capacitor with insulated screwdriver. Step 5: Disconnect and remove old capacitor. Step 6: Mount new capacitor, reconnect wires to matching terminals. Step 7: Close panel, restore power, test. Tools: screwdriver, needle-nose pliers.

My AC hums but won’t start. What part do I need?

An AC that hums but won’t start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost to start the compressor. When it fails, you hear humming but the motor can’t overcome inertia. Other symptoms: fan spinning slowly, AC cycling on/off rapidly, or a visibly swollen capacitor. Fix: replace capacitor ($15–$80 DIY, 30 min).

Is this capacitor compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar capacitor?

OEM strongly recommended. OEM capacitors have ±6% MFD tolerance vs aftermarket ±10%. The looser tolerance causes motor winding stress, higher temps, and shorter compressor life. Price difference is only $10–$20 — OEM is the clear value choice.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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