Fix
Fixes #579 — The mitsubishi_climate_proxy HACS integration was double-converting temperatures when Home Assistant is configured in Fahrenheit (°F), resulting in values ~2.26× too high (e.g. 69°F → 156°F).
Root Cause
The _source_unit property (introduced in v2026.3.2) was reading unit_of_measurement from the source climate entity's state attributes, but climate entities in HA do not expose this attribute (unlike sensor entities). The fallback to Celsius was always used, so the normalization logic never activated.
Fix
Replace the unreliable attribute lookup with hass.config.units.temperature_unit, which reliably reflects the HA instance's configured unit system.
Upgrade
Update via HACS → Integrations → Mitsubishi Climate Proxy → Update.