Common Questions Is the 314-453 kit compatible with both AC and DC models

3/8" x 4" Bulb

this 4-way reversing valve is often the culprit

" or intermittent system shutdowns during high-wind conditions or filter bypass events

Tekmar Controls 403 Control 324846-701 Common Questions Is the 314-453The Tekmar Controls 403 is a sophisticated 24Vac tN2 House Control designed for multi zone hydronic systems requiring high precision management of outdoor temperature reset and indoor temperature feedback. This microprocessor based hub effectively coordinates boiler control, domestic hot water (DHW), and mixing valve operations through a centralized tekmarNet 2 bus. Built to drive up to 4 zone pumps on board, the 403 supports single stage, two stage,