Resideo L8148E1265/U Aquastat Relay
The L8148E1265/U is an immersion-type Aquastat relay designed for oil-fired and gas-fired hydronic heating systems. It integrates high-limit protection with relay switching for both burner and circulator motor control - the high-limit function interrupts the burner circuit exclusively. Rated 120 VAC with a 180-240F operating range and 15F fixed differential. Includes Molex plug for use with an electronic vent damper. Vertical mount; 1-1/2 to 3 in. insulation depth capacity. Requires professional installation by a licensed HVAC or plumbing technician.
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Orders placed by 2:00pm EST will ship same day, except on holidays.
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Delivery & Returns
Orders will ship same day if received by 2pm EST.
Upcoming holiday closures: Monday September 7, 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.