ResideoSKU: 246741

Resideo L8148E1299 Aquastat Relay with Molex Plug

$344.94
In stock (14)

The L8148E1299 Aquastat Relay integrates high-limit protection with relay switching for burner and circulator motor control in hydronic heating systems. The high-limit function interrupts the burner circuit exclusively. This model includes a Molex plug connector and a built-in 50VA transformer with terminals for connecting a remote low-limit controller. Vertical mount; accommodates 24 VAC thermostats with a 0.2A minimum current draw. Rated 120 VAC with a 180-240F operating range and 15F fixed differential. Requires professional installation by a licensed HVAC or plumbing technician.

Shipping policy

Orders placed by 2:00pm EST will ship same day, except on holidays.

More Details

Product overview
  • High-limit burner interrupt - relay switching opens burner circuit exclusively at setpoint; circulator motor controlled independently
  • Operating range: 180-240F with 15F fixed differential
  • 120 VAC supply voltage; vertical mount
  • Includes Molex plug for use with electronic vent damper
  • Built-in 50VA transformer with terminals for remote low-limit controller connection
  • Immersion-type sensing via copper bulb well
  • Requires 24 VAC thermostat with heat anticipator set at 0.2A
Specifications
Manufacturer Part Number L8148E1299/U
UPC 85267163668
Overall Dimensions n/a
Material n/a
Domestic or Import n/a
End Style n/a
Type n/a
ADA Compliance n/a
Warning Professional installation required
Standards and Approvals UL Listed (models with well): File No. MP466, Guide No. MBPR | CSA Certified: File No. LR95329-1
Resources
Delivery & Returns

Orders will ship same day if received by 2pm EST.

Upcoming holiday closures: May 25, 2026

All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.

FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.

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