The answer to 'my furnace repair keeps shutting off' is that there are several common causes, including a malfunctioning thermostat, clogged air filters, a faulty ignition system, or an issue with the furnace's limit switch. The symptoms may include the furnace turning on and off repeatedly, inadequate heating, or the furnace not turning on at all.
In many cases, the solution may involve simple DIY troubleshooting and maintenance, such as replacing the air filters or resetting the limit switch. However, if the issue persists or you're unsure of the cause, it's best to call a professional HVAC technician to diagnose and repair the problem. They have the expertise and tools to properly identify and fix the underlying issue, ensuring your furnace is running safely and efficiently.