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HVAC Refrigeration Guide — commercial boiler

Aerco Boiler Controls: Flow Sensors, Actuators & Diagnostics

Aerco Boiler Controls: Flow Sensors, Actuators & Diagnostics

Aerco's modulating boiler controls require a different diagnostic approach than standard commercial boilers. This guide covers the three components behind most field failures — flow sensors, actuator assemblies, and control boards — with fault patterns, triage tables, and calibration tips for Benchmark and Innovation series units.

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BASO Standing Pilot Failures: Thermocouple & Gas Valve Diagnosis

BASO Standing Pilot Failures: Thermocouple & Gas Valve Diagnosis

Standing pilot systems that won't hold flame or won't open the main gas valve almost always trace to a failing thermocouple or a faulty gas valve. This guide walks through how to confirm which BASO part is actually at fault — and which replacement fits your unit — before you order anything.

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Lochinvar AO Smith Field Guide

Lochinvar AO Smith Field Guide

Lochinvar commercial water heater troubleshooting: why burner door switches trip, what causes burner soot and flame failure, and when to replace the relief valve.

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Aerco Boiler Controls Diagnostic Guide

Aerco Boiler Controls Diagnostic Guide

A field-tested diagnostic guide for Aerco boiler controls covering flow sensor failures, actuator diagnostics, control board fault triage, and temperature sensor drift — with fault code tables and calibration tips for Benchmark and Innovation series units.

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