External Temperature Sensor

Hello

I've noticed a big difference between the external temperature displayed by the muti-function display (MFD) in our Symbol Plus versus the reading displayed on the vehicle dashboard. Tonight for example, the MFD is displaying ext=3C int=10C whilst the vehicle dashboard says 8C which I believe is a more accurate reading. I know the vehicle sensor is located in the driver's wing mirror because I had to replace that recently (the wing mirror I mean). But where is the AS MFD external sensor located - anyone have any idea?

Also, am I correct in assuming that the tank anti-frost blankets will be operated by the AS sensor rather than the vehicle sensor - or do they have yet another sensor?

Many thanks
Des

According to the manual the tank heaters operate (when switched on) if the tank contents drop below 6.7C, and switch off when the tank contents rise above 18C. They have their own built in temperature sensor.

I expect so, unless they have changed suppliers. Did you get a Tank Blanket leaflet in with the book pack?

The Harmony UMS User Instruction Handbook which covers the EC700 explains that the frost warning symbol (on the EC700 CP's top bar) is displayed when the external temperature is below 2 degrees C.  It further states that the tank heaters button will be back lit blue when active.  This doesn't mean that the tank heaters will be switched on.  The tank heaters will only be on while the external temperature is below 2 degrees C and if there is over 25% of water in the tanks.  If the external temperature rises above 2 degrees C, the heaters will turn off but remain active until switched off at the CP.

The heaters are 12V and will turn off 15 mins after the engine stops unless the PX300 is connected to the mains.

I have used the tank heaters on a couple of occasions when the daytime temperature didn't rise above zero and the nighttime temperature was several degrees below zero.