What MFD capacitor do I need for my Tempstar AC?

The correct replacement for Tempstar model TCA748GKA200 — 30+7.5 MFD 370V | 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 TCA748GKA200 — 30+7.5 MFD 370V | 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 Dual Run Capacitor for TCA748GKA200 — 30+7.5 MFD 370V | Ships Today

Name: Tempstar Dual Run Capacitor for TCA748GKA200 — 30+7.5 MFD 370V | Ships Today
Brand: Tempstar
SKU: 1174851-GEN
Price: 24.95 USD
Availability: InStock

SKU: 1174851-GEN Brand: Tempstar

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Overview

This genuine OEM dual run capacitor (part number 1174851) provides the starting and running torque for both the compressor and condenser fan motor on the Tempstar TCA748GKA200. It is a round 370-volt capacitor rated at 30 MFD for the compressor (HERM terminal) and 7.5 MFD for the fan (FAN terminal), with a common (C) terminal. The capacitor stores and releases electrical energy to keep both motors running efficiently. As capacitors age they lose capacitance, bulge, or short out — the single most common cause of a no-cool call. Symptoms include a compressor or fan that hums but won't start, a fan that needs a push to spin, hard starting, frequent breaker trips, or a visibly swollen top. A fresh 30+7.5 MFD capacitor restores full torque and protects the motors from overheating.

Specifications

Spec	Value
Part Number	1174851
Type	Dual Run, Round
Brand	Tempstar (ICP/Heil)
Capacitance	30 + 7.5 MFD
Voltage	370 VAC
Fits Model	TCA748GKA200

Compatibility

Designed as the factory replacement for the Tempstar TCA748GKA200 condenser. This 30+7.5 MFD 370V round capacitor also services matching ICP, Heil, and Comfortmaker condensing units that use the same compressor and fan combination. A 370V capacitor may safely replace a 370V unit; verify the MFD values and terminal layout before installing.

Installation Guide

Safety First — Disconnect power, then discharge the capacitor across its terminals and verify zero voltage with a multimeter.
Access — Remove the condenser service panel.
Document — Photograph the HERM, FAN, and C terminal wiring before disconnecting.
Remove — Pull the spade connectors, loosen the mounting strap, and remove the old capacitor.
Install — Secure the new capacitor and reconnect each lead to the matching HERM/FAN/C terminal per your photo.
Test — Restore power, call for cooling, and confirm both the compressor and fan start instantly.

Signs You Need a Replacement

Compressor or fan motor hums but won't start.
Condenser fan needs a manual push to spin up.
Bulging or leaking capacitor top.
Intermittent cooling or tripped breakers on startup.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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 Dual Run Capacitor for ...

$24.95

Frequently Asked Questions

Does this Capacitor fit my Tempstar TCA748GKA200 — 30+7.5 MFD 370V | Ships Today?

Yes. This is the factory-specified OEM capacitor for the Tempstar TCA748GKA200 — 30+7.5 MFD 370V | 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 TCA748GKA200 — 30+7.5 MFD 370V | 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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