A caught closed thermostat is a thermostat that’s unable to open, inflicting the system it controls to overheat. This is usually a major problem, as it may well result in harm to the system and even to a hearth. There are a variety of issues that may trigger a thermostat to stay closed, together with a build-up of dust and particles, a defective electrical connection, or a mechanical drawback.
You will need to concentrate on the indicators of a caught closed thermostat so as to take motion to repair it earlier than it causes any harm. These indicators embrace: