Getting your expansion valve sensing bulb location right
Finding the perfect expansion valve sensing bulb location is one of those small details that can either make your AC run like a dream or turn it into a nightmare for the compressor. If you've ever dealt with a system that just won't stay steady—maybe it's "hunting" or you're seeing ice where it shouldn't be—there's a good chance that little bulb is just sitting in the wrong spot. It's easy to overlook because it looks like such a simple component, but it's actually the "brain" that tells the thermostatic expansion valve (TXV) exactly how much refrigerant to let into the evaporator. ...