The REM is a brand new, next generation, live data scanner for Renix ECUs
that reads the ECU data stream and spies on it
So when the Renix ECU commands the EGR to open, the REM scanner displays :guitar: that command.
I am waiting for the final version to come out. It has about 10 versions and 20 open programming updates already. The guy making them must have made over 150 of them already.
And yes, the Renix does have a thermal switch but it does not get involved directly with the EGR. It operates a diverter intake air valve in the filter box to an air intake hose that pulls hot exhaust manifold air into the intake during the warm up period.