Hi, im very new to all of this so plz plz bear with me. Okay so we're using this "thermalwave blueline" machine and as the title says the machine will turn on but the moment I flip the pump switch ON the truckmount just shuts off after a few seconds. We have already changed the oils, check the filters, dumped all water from waste tank, replaced a bad valve because it was overheating and smoking but still nothing, the machine just will not stay on. I have done research all I keep finding is I might have a low pressure sensor problem. So does anyone think based on what I described that it is a low pressure sensor?? And if so how do I find or test this part?? Thanknyou for taking the time to read threw this.