When your Aqua-Hot hydronic heating system runs low on fluid, this brass level switch is the sentinel that shuts things down before damage occurs. If your Aqua-Hot unit is throwing a low-fluid fault, failing to fire, or showing erratic behavior tied to fluid level sensing, ELE-800-002 is the OEM replacement part that restores proper protection -- and peace of mind -- to your rig's heating and hot water system.
Aqua-Hot hydronic heating systems are the gold standard for coach heating and on-demand hot water in high-end Class A diesel pushers and premium motorhomes. The system circulates a glycol-water mixture through a diesel-fired or engine-coolant-integrated boiler, supplying both radiant floor/baseboard heat and domestic hot water from a single integrated unit.
The fluid level switch (ELE-800-002) monitors the fluid reservoir and interrupts the firing circuit if the hydronic fluid drops below a safe operating threshold. A failed or faulty switch can cause nuisance shutdowns, prevent the unit from firing at all, or -- if it fails in the "always open" state -- allow the boiler to run dry. Replacing a worn switch with a genuine Aqua-Hot brass unit restores both safety and reliability.
Machined brass housing resists corrosion from glycol-water mix and withstands the heat environment of the Aqua-Hot boiler compartment.
Genuine manufacturer part number ELE-800-002. Direct replacement -- no adapters, no splicing, no guesswork on fitment.
Cuts the firing circuit when hydronic fluid drops below safe level, preventing costly boiler damage from dry-run conditions.
At 0.6 lbs and compact dimensions, this switch installs in the reservoir or boiler assembly without clearance issues in tight compartments.
Aqua-Hot systems are built in several configurations. The ELE-800-002 fluid level switch is associated with the 400D, 450D, and 600D series hydronic heating units -- the diesel-fired standalone systems most commonly found in Class A coaches from manufacturers such as Tiffin, Newmar, Monaco, Holiday Rambler, and Foretravel. If your coach was built with factory Aqua-Hot heat, there is a strong likelihood this is the correct level switch for your reservoir assembly.
The fluid level switch threads directly into the Aqua-Hot fluid reservoir at a designated port. The brass body seals against the reservoir housing; electrical leads connect to the system wiring harness at the OEM connector. No special tools beyond a wrench and thread sealant are required for most installations. Always depressurize and allow the system to cool before removing the old switch.
This switch is the right solution for Class A motorhome owners with factory-installed Aqua-Hot hydronic systems who are performing their own service, as well as RV technicians performing warranty or post-warranty repairs. It is also the correct part for coaches where the original switch has aged, corroded, or been damaged during a fluid flush or reservoir inspection.