What MFD capacitor do I need for my Tempstar AC?

The correct replacement for Tempstar model TCA948GKA100 — 45/440 | 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 TCA948GKA100 — 45/440 | 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 Single Run Capacitor 45 MFD 440V for TCA948GKA100 — 45/440 | Ships Today

Name: Tempstar Single Run Capacitor 45 MFD 440V for TCA948GKA100 — 45/440 | Ships Today
Brand: Tempstar
SKU: 1185069-GEN
Price: 22.95 USD
Availability: InStock

SKU: 1185069-GEN Brand: Tempstar

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Overview

This is a genuine OEM single-run capacitor (part number 1185069) rated at 45 MFD and 440V for the Tempstar TCA948GKA100 condensing unit. The run capacitor stores and delivers the electrical phase shift the compressor and condenser fan motor need to start smoothly and run efficiently. A weak or failed capacitor is one of the most common causes of an outdoor unit that hums but will not start, trips the breaker, or short-cycles on hot days. Replacing a tired 45 MFD capacitor restores full starting torque and protects the compressor windings from overheating. The 440V rating provides ample headroom over the typical 208/230V supply for long service life.

Specifications

Spec	Value
Part Number	1185069
Type	Single Run Capacitor
Brand	Tempstar
Capacitance	45 MFD
Voltage	440V (440 VAC)
Fits Model	TCA948GKA100

Compatibility

Engineered for the Tempstar TCA948GKA100 condenser and shared across many ICP-family units (Heil, Comfortmaker, Arcoaire) built on the same platform. Always confirm the MFD and voltage rating against your existing capacitor before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter. Capacitors store a charge.
Access — Remove the condenser electrical access panel.
Document — Photo all wires before disconnecting.
Discharge & Remove — Safely discharge the old capacitor across the terminals with an insulated resistor, then disconnect the leads and release the mounting strap.
Install — Mount the new 45 MFD capacitor, secure the strap, and reconnect each terminal per your photo.
Test — Restore power and verify the compressor and fan start and run normally.

Signs You Need a Replacement

Outdoor unit hums but the fan or compressor will not start.
Capacitor top is bulged, leaking, or domed.
System short-cycles or trips the breaker on startup.
Measured capacitance reads well below 45 MFD.

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 Single Run Capacitor 45...

$22.95

Frequently Asked Questions

Does this Capacitor fit my Tempstar TCA948GKA100 — 45/440 | Ships Today?

Yes. This is the factory-specified OEM capacitor for the Tempstar TCA948GKA100 — 45/440 | 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 TCA948GKA100 — 45/440 | 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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