Taco LFM0243S-1 LWCO

The Taco LFM0243S-1 LWCO is a professional-grade, microprocessor-based low water cut off designed to provide dependable protection for hydronic heating systems. Operating on 24V AC power, this electronic probe-style control is the direct replacement for LTM0243N-1, ensuring a seamless upgrade for legacy boiler installations. It features a rugged 3/4" NPT probe and manual reset functionality, making it an ideal primary limit control for hot water boilers or a secondary cutoff for low-pressure steam units.

Built for the rigors of the field, the unit includes DualVision Technology and a foam compensating design to prevent nuisance shutdowns caused by entrained air or bubbles. The NEMA 1 enclosure houses simplified terminal block wiring and external LED indicators for real-time status updates and simplified troubleshooting. Rated for pressures up to 250 PSI and temperatures to 150°F, this Taco boiler control is also suitable for protecting pumps from dry-run conditions in condensate receiver tanks.

Key Benefits

• Direct HVAC Replacement: Engineered to replace the LTM0243N-1 without mounting modifications.
• System Reliability: Advanced foam compensation prevents false low water readings in high-velocity or aerated systems.
• Contractor-Friendly Install: Features simplified wiring and external LEDs for rapid commissioning and diagnostics.
• Versatile Application: Suitable for solar, geothermal, and water/glycol concentrations up to 50%.
• Heavy-Duty Construction: Rated for high-pressure environments up to 250 PSI.

Common Questions

Is the LFM0243S-1 compatible with steam boilers?
Yes, it can serve as a primary or secondary low water cutoff for low-pressure steam boilers and is often used to activate automatic water feeders or alarm systems.

How does this unit handle glycol systems?
The Taco LFM0243S-1 is specifically compatible with hydronic systems using up to a 50% water/glycol mixture, making it standard for geothermal and closed-loop cooling applications.

What is the purpose of the manual reset on this model?
The manual reset ensures that if a low water condition occurs, a technician must physically inspect the system before the burner can re-fire, providing an extra layer of safety for the heat exchanger.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.