WaterFurnace
A leading residential geothermal name (NIBE group). Inverter-driven Series 7 on the high end. Loop side first, always: flow, entering water temperature and ΔT tell you whether the ground loop or the machine owns the complaint.
The family: ClimateMaster, WaterFurnace and IEC — water-source, geothermal and hydronic fan-coil specialists.
Same family: IEC (International Environmental), ClimateMaster
What they make
Water-source / geothermal heat pump
Lessons carry overA heat pump that trades with water instead of outdoor air — a building loop in condos and offices, a ground loop in geo homes. Compact, quiet, hidden in closets.
The compressor circuit — caps, contactors, windings — fails exactly like the board’s scenarios. The “condenser” is a water loop: verify flow, entering water temperature and ΔT before you trust any gauge reading.
Open in the Copilot (reference) →Practice: runs but won’t cool →Practice: gauges on →
Tech support
Tech support here is the guided Copilot with your WaterFurnace info already loaded — one question at a time, evidence before parts, and everything you enter rides into the service report.
Model-number decoding here covers residential and multi-family split systems and package units, 5 tons and under — WaterFurnace equipment lives outside that scope, so the manufacturer’s literature leads on model specifics. The Copilot still loads the brand for a guided session.
Start tech support — WaterFurnace loaded →