Review on 🔌 Zerostart 3100002 Engine Block Heater: Ford, Jaguar, Mazda, Lincoln, Volvo - CSA Approved, 120V, 400W by Srinivas Johnson

This threaded version will not fit F150 5.4 3v 2006, I called Zerostart and they said there was a mismatch with this application. Zerostart took my name and phone number so a technician could contact me, but I haven't heard from them in a week now. The heater screw is 3/4 NPT and the drain screw is 3/8 NPT. I even checked the Zerostarts application guide before purchasing, it's not Amazon's fault they have incorrect product information. See photo for comparison.