The Hydronic Authority
Equipment Reference

Boiler Equipment & Brand Reference

An independent technical index of 12 major hydronic boiler manufacturers plus key pump and control platforms. Explore control architectures, model families, diagnostic characteristics, and verified documentation sources.

Maintained by the Hydronic Authority editorial team · Field experience: Phillips Hydronics · Reviewed: pending · Updated: 2026-07-22

Boiler Manufacturers

Modern hydronic boilers vary significantly in heat exchanger metallurgy (stainless steel vs. aluminum vs. cast iron), combustion control platforms, and diagnostic display methods. Select a brand below to view its specific platform notes, model families, service topics, and error code resources.

Bosch · 11 Error Codes

Bosch Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Bosch boilers.

View platform notes & diagnostics → Burnham · 9 Error Codes

Burnham Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Burnham boilers.

View platform notes & diagnostics → HTP · 10 Error Codes

HTP Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for HTP boilers.

View platform notes & diagnostics → IBC · 11 Error Codes

IBC Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for IBC boilers.

View platform notes & diagnostics → Laars · 8 Error Codes

Laars Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Laars boilers.

View platform notes & diagnostics → Lochinvar · 11 Error Codes

Lochinvar Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Lochinvar boilers.

View platform notes & diagnostics → Navien · 42 Error Codes

Navien Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Navien boilers.

View platform notes & diagnostics → NTI · 11 Error Codes

NTI Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for NTI boilers.

View platform notes & diagnostics → Rinnai · 11 Error Codes

Rinnai Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Rinnai boilers.

View platform notes & diagnostics → Triangle Tube · 147 Error Codes

Triangle Tube Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Triangle Tube boilers.

View platform notes & diagnostics → Viessmann · 33 Error Codes

Viessmann Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Viessmann boilers.

View platform notes & diagnostics → Weil-McLain · 11 Error Codes

Weil-McLain Boiler Equipment & Error Codes

Technical specifications, platform control notes, and complete error code lookup table for Weil-McLain boilers.

View platform notes & diagnostics → Taco, Caleffi, Grundfos, SpacePak

Controls & Circulators: Taco, Caleffi, Grundfos, SpacePak

Diagnostic guidelines for Taco, Caleffi, Grundfos circulator pumps, zone valves, and SpacePak hydronic controls.

View control & pump diagnostic notes →

Error Code Policy

Error Code Database Location

Complete error-code lookup tables and fault dictionaries are maintained by Phillips Hydronics at phillipshydronics.com/error-codes.html. Hydronic Authority equipment pages provide high-level platform explanations and direct links to the official error code lookup tool for each brand.