littlescrote
Posts: 173
Joined: Fri Jul 26, 2019 3:52 am

Re: Heater not working

Thu Nov 19, 2020 5:00 am

greendwarf wrote:
Wed Nov 18, 2020 2:37 am
Picking up from a different thread, is it possible to programme the MMCS to turn off heating?
Huh? It's possible to program in a timed session (start at hh:mm for x minutes, where x = 10, 20 or 30), but that's all. Meant for pre-heat, pre-demist or pre-cool.

greendwarf
Posts: 2114
Joined: Tue Aug 05, 2014 1:32 pm

Re: Heater not working

Fri Nov 20, 2020 5:14 am

Ok - back here in steerage with our "no electric heater or MMCS" Gx3Hs we are ignorant of these technical wonders - and the frustrations they cause :lol:

One further thought about cold air after a while - does it happen when ICE is running? - as it could be the valve in the engine cooling system jammed shut stopping circulation through the heater matrix. :idea:

kromo
Posts: 6
Joined: Wed Oct 14, 2020 12:39 am

Re: Heater not working

Fri Nov 20, 2020 5:43 am

yes, it happens when ICE is on

greendwarf
Posts: 2114
Joined: Tue Aug 05, 2014 1:32 pm

Re: Heater not working

Sat Nov 21, 2020 1:12 am

My thinking is, that in general, the car tries to conserve the battery at all times. So it would be logical for the electric heating to cut out once the engine coolant has reached normal temperature because it will expect coolant will start circulating through the heater matrix but if the valve that controls this is jammed shut then all you get is cold air!

More worryingly this will happen if the coolant level is too low! How do you know there is a radiator leak in an ICE car ? When the heater blows out cold air suddenly. So there could be a more serious problem if the ICE cooling is not effective.

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