Choosing a replacement furnace blower motor starts with two questions: how much horsepower does your system need, and does the replacement match the original motor's electrical specs and mounting size? This pairing pits a 1/3HP 110-120V four-speed motor with a 48-frame design against a 1/2HP 115V four-speed motor positioned as a direct-fit replacement for specific GE part numbers. The decision is less about which is "better" and more about which matches your furnace rather than overpowering or underpowering it.
Quick verdict
If your current motor is a 1/3HP 48-frame unit and you want the lower listed price, the 1/3HP Furnace Blower Motor is the straightforward pick. If your furnace uses a 1/2HP motor and mirrors the GE model patterns 5KCP39LGS093S, 5KCP39LGM301AS, or 5KCP39LGR668AS, then the 1/2HP replacement is the one to buy.
Listed-price and spec comparison
| Product | Listed price | Price bar | Key specs |
|---|---|---|---|
| 1/3HP Furnace Blower Motor 110-120V 4.4A 1075RPM 4 Speeds 48 Frame 1 Phase | USD 67.29 | 1/3 HP, 110-120V, 4.4A, 4-speed, 48 frame | |
| 1/2HP 115V Furnace Blower Motor 5KCP39LGS093S 5KCP39LGM301AS 5KCP39LGR668AS | USD 112.99 | 1/2 HP, 115V, 4-speed, thermal protection, ball bearings |
Where the 1/3HP Furnace Blower Motor wins
- It carries the lower listed price in this comparison, so budget-conscious replacements start here.
- The 48-frame size and 110-120V rating are clearly listed, making it easy to see if your blower compartment matches.
- It includes a 5μF/370V capacitor and an 11-inch hold hoop in the listing, and the CW/CCW rotation allows you to match airflow direction.
Where the 1/2HP Furnace Blower Motor wins
- The compatibility story is specific: it's engineered to match GE models such as 5KCP39LGS093S, 5KCP39LGM301AS, and 5KCP39LGR668AS, plus it lists a long set of interchangeable part numbers.
- At 1/2HP, it provides more power than the 1/3HP option; the description also notes ball-bearing construction and thermal protection.
- With 115V, 1075 RPM, and four speeds, it covers the electrical spec most residential furnace blowers in this class use.
1/3HP Furnace Blower Motor 110-120V 4.4A 1075RPM 4 Speeds 48 Frame 1 Phase
Choose this motor when the furnace's existing blower is rated at 1/3HP and the price tag is the deciding factor. The 48-frame, 110-120V, 4.4A design runs at 1075 RPM with four speeds, and the included 5μF/370V capacitor plus 11-inch hold hoop means you don't have to source those components separately. The CW/CCW dual rotation gives you room to match the way your old motor was wired. The limitation is the 1/3HP ceiling: this motor can't stand in for a 1/2HP system, so confirm the exact horsepower rating on the existing motor before you order.
1/2HP 115V Furnace Blower Motor 5KCP39LGS093S 5KCP39LGM301AS 5KCP39LGR668AS
Pick this motor when the replacement part number on your furnace lines up with the GE family listed here, including 5KCP39LGS093S, 5KCP39LGM301AS, and 5KCP39LGR668AS. It delivers 1/2HP at 115V with four speeds, and the listed construction highlights ball bearings and thermal protection for quieter, safer operation. The tradeoff is the higher price of the two motors, so if your blower only requires 1/3HP, the extra power isn't doing you any favors. If you've already confirmed a 1/2HP replacement is what the furnace needs, the direct-fit compatibility list is the strongest reason to spend the extra money.
Final choice by use case
- Replacing a 1/3HP furnace blower and want the lower price: 1/3HP Furnace Blower Motor at USD 67.29.
- Replacing a 1/2HP motor with a GE 5KCP39-style part number: 1/2HP 115V Furnace Blower Motor at USD 112.99.
- Not sure which rating your furnace needs: match the horsepower printed on the existing motor before choosing either one.
