What does Swegon fault code E2 mean?

Fault code E2 on Swegon systems indicates outdoor unit sensor fault — check outdoor thermistor. Check the Swegon installation manual for model-specific diagnostic procedures and recommended corrective actions.

How do I troubleshoot a Swegon system that won't start?

Start by checking power supply, thermostat settings, and safety switches. For Swegon equipment with digital controls, review the fault history log for recent error codes. Check that all safety interlocks are closed and the system is not in lockout mode.

Where can I get Swegon technical support?

Swegon technical support is available through their distributor network and online support portal. For instant AI-powered troubleshooting answers about Swegon equipment, try AskWhiz on WhatsApp — get expert responses in seconds.

HVAC

Swegon error codes, decoded.

Look up any Swegon fault code below. Each one is grounded in Swegon's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.

By Octavian Ghindea

Co-founder & CTO · Reviewed August 2026

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Swegon sits in our HVAC coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Swegon display?

Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.

Outdoor unit sensor fault — check outdoor thermistor

Indoor unit sensor fault — check thermistor resistance

Low pressure protection — check refrigerant charge

Fan motor fault — check motor and capacitor

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Common questions about Swegon equipment

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