Resideo L8148E1265 Relay

High Limit Aquastat Relay, 120Vac, 180-240 Degree High Limit Operating Range, 15 Degree Fixed Differential Temperature, 1 1/2"-3" Insulation, 0-95% RH Operating Humidity Range, 4 1/2" Capillary Length, SPST High Limit and Circulator Switching, Vertical Mount, Includes Molex Plug for Use with Vent Damper

L8148E1265 is the direct replacement for L8148E1281/B

Resideo L8148E1265 High Limit Aquastat Relay – 120V, Vertical Mount, 180–240°F Range, SPST Switching, UL Listed

The Resideo L8148E1265 is a premium immersion-type high limit aquastat relay, designed to provide dependable control for burner and circulator motors in hydronic heating systems. This versatile controller combines high limit temperature protection with relay-based switching, ensuring safe and efficient system operation.

Key Features:

• Voltage: 120 Vac

• Operating Temperature Range: 180°F to 240°F (82°C to 116°C)

• Fixed Differential Temperature: 15°F

• Mounting Orientation: Vertical

• Switching Action: SPST for high limit and circulator control

• Capillary Length: 4 1/2 in. (114 mm)

• Insulation Depth Compatibility: 1 1/2" to 3" (38 mm to 76 mm)

• Humidity Range: 0–95% RH, non-condensing

• Thermostat Requirement: 24 Vac with 0.2A anticipator setting

• Includes: Molex® plug for use with vent damper and heat-conductive compound

• Case Dimensions: 6 1/8" H x 4 5/16" W x 3 1/8" D (156 mm x 110 mm x 79 mm)

Electrical Ratings:

• Burner Control:

  • Full Load: 7.4A @ 120 Vac / 3.7A @ 240 Vac

  • Locked Rotor: 44.4A @ 120 Vac / 22.7A @ 240 Vac

• Circulator Control:

  • Full Load: 7.4A @ 120 Vac / 3.7A @ 240 Vac

  • Locked Rotor: 44.4A @ 120 Vac / 22.2A @ 240 Vac

• Low Voltage: 0.8 A max. @ 24 Vac

Certifications:

• UL Listed (File No. MP466, Vol. 13, Sec. 2)

• CSA Certified (File No. LR95329-1)

• RoHS Compliant

Applications: Ideal for use in hot water boiler systems requiring high limit control and pump switching. The L8148E1265 offers robust performance for residential and light commercial hydronic heating systems.

Why Choose the Resideo L8148E1265?
Trusted by HVAC professionals, this Tradeline model ensures safe burner shutoff at high temperatures while offering easy integration with vent dampers via a Molex® plug. Its compact form factor and vertical mounting option make it a convenient solution for tight installations.

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