It would as described above. When they throttled under less airflow they would have used less wattage. The new, if even slightly higher wattage could have been just enough to trip the breaker. As an example in my apartment, you can use the PC, kettle, toaster and microwave at the same time. Switch a 60 watt light bulb on? Pop. Everything off. Some heaters draw an insane wattage, the one in my room is 2000W