Hydronic heat • Boilers • Pumps • Zones • Controls

Hydronic Heating Parts & Diagnostic Service

Boiler and hot-water heating components organized by system function, with the original supplier references preserved on every linked part image.

Common hydronic components

Select a linked card to open its original supplier reference, or request diagnosis with the complete boiler and part data.

Aquastat & high-limit relays

Temperature control, transformer, burner circuit and circulator logic must match the application.

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Gas valves

Voltage, ignition type, pressure range, capacity and manufacturer specifications are verified.

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Zone control modules

Transformer capacity, thermostat inputs, end switches, priority and circulator outputs are matched.

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Hot-surface igniters

Electrical rating, geometry, mounting position and ignition-control compatibility are required.

View igniter references →

Circulator pumps

Flow, head, pipe size, flange orientation, voltage and system zoning are reviewed before selection.

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Combustion evaluation

Flame appearance is only one clue; draft, gas pressure, combustion readings and venting determine the real condition.

Timing & control relays

Coil voltage, contact ratings, delay function and wiring sequence must match the existing control.

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Correct identification matters. Parts are matched from the complete equipment model and serial number, electrical ratings, dimensions, wiring and the actual diagnosis—not from appearance alone.

How the service process works

• Identify the boiler, burner, controls, pumps, valves and zone arrangement.
• Test voltage, water temperature, pressure, flow and the complete operating sequence.
• Correct circulation, air, expansion or control problems that can imitate a failed component.
• Commission the repaired zone or boiler and verify limits, circulators and heat delivery.