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The HONEYWELL gsk-3 is a spill switch designed to detect flue gas spillage in heating appliances, triggering a safety shutoff when combustion gases escape into the living space rather than venting properly. This type of switch is a critical safety component in atmospheric-vented heating equipment, wired into the control circuit to shut down the appliance before dangerous levels of carbon monoxide can accumulate. It is typically installed by licensed HVAC technicians or gas appliance service professionals during routine maintenance or safety upgrades.
The gsk-3 is intended for use with HWK and CK series heating appliances, including water heaters and similar atmospheric-vented equipment where flue spillage monitoring is required. This switch serves as a field-replacement part, restoring proper safety interlock function in systems where the original spill switch has failed or is being proactively replaced as part of a service call.
Designed for use with HWK and CK series heating appliances. Referenced OEM part number 46086400 in original application documentation.
Spill switch replacement should be performed by a licensed HVAC technician or qualified gas appliance service professional. Before servicing, shut off gas supply and disconnect electrical power to the appliance. The switch mounts at or near the draft diverter and connects into the low-voltage control circuit. Verify correct wiring and secure mounting before restoring power and confirming proper appliance operation per manufacturer service documentation.
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