Ignition Sequence Verification
Follow the precise order of operations: inducer, pressure switch, igniter, gas valve, and flame sensor.
System Diagnostics
Master Hydronic Heating & Boiler Calls
From atmospheric cast iron to high-efficiency mod-con boilers, simplify diagnostics for complex hydronic systems.
FAULT SYMPTOM
Low suction pressure
CHECK 01
Measure Evaporator Temperature Drop (Delta-T). What is the temperature drop across the coil?
High Drop (Above 22°F)
DIAGNOSIS
Dirty air filter, closed supply registers, or low speed blower.
Low Drop (Below 16°F)
CHECK 02
Measure Superheat and Subcooling. What are your readings?
High Superheat, Low SubcoolingLow Superheat, High Subcooling
Complete diagnostic tree — every branch, every fault path
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Hydronic Flow Analysis
Diagnose air-bound loops, circulator pump failures, and expansion tank issues quickly.
Safety Control Logic
Easily troubleshoot Low Water Cutoffs (LWCO), aquastats, and high-limit switches.
The Three-Step Workflow
01
Select Boiler Type
Choose between standard efficiency, mid-efficiency, or condensing boiler workflows.
02
Step-by-Step Logic
Isolate electrical faults from hydraulic issues with clear, ordered tests.
03
Confirm Operation
Verify proper water temperature, pressure, and combustion analysis metrics.
Frequently Asked Questions
Why is one radiator always cold?
This is usually air trapped in the loop or a seized zone valve. We guide you through purging procedures and electrical verification of actuator heads.
The boiler fires but rapid cycles. What causes this?
Short cycling can be caused by dirt in the filter (if applicable), improper anticipator setting, or oversized equipment. We help check flow rates and delta-T.
Does this cover steam boilers?
Yes, we include specific checks for sight glass levels, pressuretrol settings, and pigtail siphon blockages common in steam systems.
Ready to Diagnose Faster?
Get the precise sequence and support you need on every call.
