Cabin heater issues

[g8dhe]

Its the electronic type which is why I refereed to a servo rather than a cable

[Bongolia]

Oh dear. I am on the right page then.
So if the system regulates the temperature there must be a sensor or something in the cab wouldn't there?
I know there would be one for the AC could this be used to control the flap position without the AC being "switched on"? Does the heater work in conjunction with the AC? maybe?

[g8dhe]

Yes there is a temperature sensor in the cab, down by the passenger seat little grid in the dash fascia, lower left below the radio;


The control servo's shown below;

[Bongolia]

Had a quick look today and it appears that for each degree in temp drop or rise made at the controller panel the flap moves a step. I dont think the temp sensor is linked to the heater side of the controller more to do with the AC and so cabin temp without AC on is not actively controlled. A warm air gun played on the sensor with AC off produced no movement of the actuator. So it would seem the number on the display is just a rough estimate of the cabin temp.

What I did note was that the "full in the face" setting moved the flap to cold at anything less than 32 degs, that makes me think 32 degs overrides the controller.
So at 32degs the system seems to go into bypass and moves the flap to give full heat to cabin irrespective of mode selected,
at any mode other than "full in the face" I found the temp could be regulated via the control panel.
Ignis, I dont know whether yours is the same , worth a try.
I also looped the rear heater back in and found no problems back there.
So on mine the problem.if there is one, seems to be on the front heater.

[vicksplace]

We had a similar question and the good news is that your dash vents are working as Mazda intended. Here's a link to our post where Jimmo62 answers the question...
http://igmaynard.co.uk/bongo/forum/view ... =3&t=71475

[Bongolia]

We had a similar question and the good news is that your dash vents are working as Mazda intended. Here's a link to our post where Jimmo62 answers the question...
http://igmaynard.co.uk/bongo/forum/view ... =3&t=71475

Thanks for that Vicksplace
I note that info was running in auto mode which I didn't try but used the van today and quite happy all is as it should be.
I should get a handbook could have saved a bit of bother.

[Ignis]

Right, I think I may be a on different page here.

Ignis, is your vehicle fitted with the automatic AC panel that gives a digital read out or do you select fan speed via a rotary knob?

Sorry, Bongolia, didn't realise they were answers here on the forum...

I have an automatic AC panel. Drove to Brighton today and found that the driver's side is more affected by the problem. The passenger gets more warmish air, not ideal, but still, which seems a bit odd to me as I didn't know that two sides are controlled separately.

[Ignis]

We had a similar question and the good news is that your dash vents are working as Mazda intended. Here's a link to our post where Jimmo62 answers the question...
http://igmaynard.co.uk/bongo/forum/view ... =3&t=71475

Thank you vicksplace! It is too late for me to try it out now as I am in a campsite, but I'll check it out tomorrow. I don't remember using Auto before changing antifreeze, it used to work though... Anyway, if the described method solves the issue, I'll be a happy elephant, who will only have one problem to think about, ie whether to change my current rear conversion to the side one...

[al & chris]

I think we had similar problem once and after taking temp sensor off from behind dash and cleaning it it was a lot better. Sensor was full of fluff and dirt.

[Ignis]

I think we had similar problem once and after taking temp sensor off from behind dash and cleaning it it was a lot better. Sensor was full of fluff and dirt.

Was it difficult to get to the sensor?..

[Bongolia]

I think we had similar problem once and after taking temp sensor off from behind dash and cleaning it it was a lot better. Sensor was full of fluff and dirt.

Was it difficult to get to the sensor?..

No they are easy to get at you will need to drop down the glove box then you get get at it. Held in with crosshead screw.
I belive it is used by AC rather than standard heater although in auto mode it may do. I didnt check into that.

[Ignis]

Thank you, Bongolia! I'll check the thermostat tomorrow morning.

Played with different modes/temperature levels etc today and found that if I set blowing to my feet, the air is all nice and warm, in auto regime it automatically goes into feet mode and so the warm air is blown. However, from those holes which are directed into the cab itself only warmish air blows, with the driver's side getting even cooler air than the passenger's side (unless I get up to 32C, when hot air is blown).