Boiler room feels unusually hot, boiler casing very warm even when not firing

Safety: High ambient temperatures can affect boiler electronics.

• Check boiler status: Confirm via the display whether the boiler is actually firing or just hot from residual heat.
• Inspect pipe insulation: Ensure primary flow and return pipes near the boiler are insulated to reduce heat loss into the room.
• Observe pump operation: After burner shutdown, the pump should run for a short overrun period. If it stops immediately, residual heat may build up.
• Technician tasks: A professional can test pump overrun control, check for gravity circulation issues, and verify sensor readings.