Thermostat plastic housing becomes noticeably warm to the touch.

Safety first: If it is too hot to touch or there is any smell, switch off power and contact a professional.

• Check settings: Reduce display brightness and disable unnecessary always‑on features.
• Location: Ensure the thermostat is not mounted on a warm flue or above a radiator.
• Monitor: If warmth is mild and stable, it may be normal. If it increases or is accompanied by malfunctions, replace the thermostat.