2002 Genie S40 problem

We have two identical 2002 S40s with Ford dual fuel. Recently one of them started acting up and it has me stumped. It will idle fine until you use one of the functions or switch it to high rpm. Then it will shut off like you hit the e-stop. No sputtering or anything. The oil safety shutoff seems fine. To make a long story short we switched the water temp sensors around from the other lift and now they are both doing this. So it seems the temp sensor is shutting it down. Can something...

2002 Genie S40 problem

2002 Genie S40 problem