A term used to describe a valve seat where the valve seat and valve stem share a common center. In this design, the valve can seal against the seat no matter how it is rotated. cylinder head. The part of the engine that is bolted to the engine block and caps off the top of the combustion chamber.
Heat Pump â The heat pump is built into the AC and works great if you use it correctly. From my experience and mistakes Iâve learned a lot about this little heat pump: 1. The Heat Pump does not work when temperatures are below 45 degrees. 2. Do not attempt to run the heat pump when plugged into a 20a outlet, use the heat pump when youâre plugged into a 30a or 50a plug. 3.
Understanding Defrost Cycle . During winter months many heat pumps will need to go through a âdefrostâ cycle during operation. Often this has not been explained well before installation, which leads to a lot of confusion about why the heat pump is not working.