Ford 6810 heater

[Agri Spec Solicitor]

I hope someone can please help with this problem. Trac has been away for serious surgery, cab off split etc.
We topped up water in radiator.
We ran it for a while until hot. The cab heater is not responding. In the pics below the hoses highlighted in red are hot.
What do we do with the 3 taps marked blue and green? Turn in clockwise or turn out anti-clockwise?
The heater worked before the surgery so what can we do to fix it?
Any help appreciated .

 

[Nearly]

Airlock in the top of the cab?
You might be able to clear it by slackening a pipe on a tap. That will let you see which way is off too.
@forblue

 

[Agri Spec Solicitor]

Airlock in the top of the cab?
You might be able to clear it by slackening a pipe on a tap. That will let you see which way is off too.
@forblue

Thanks so much.
I now understand the manual better and the high level taps, not sure about the low level tap, are meant to be closed in summer to stop hot water getting into the cab area. Makes sense.
I took off a hose and topped up the rad as the fluid was lost.
Lo and behold heater now works!
That saved a lot of head scratching. Well done

 

[forblue]

Lower tap is for water filter. beware of turning those top taps off t breaks off and or they will leak just leave undone.

 

[douglas56]

I hope someone can please help with this problem. Trac has been away for serious surgery, cab off split etc.
We topped up water in radiator.
We ran it for a while until hot. The cab heater is not responding. In the pics below the hoses highlighted in red are hot.
What do we do with the 3 taps marked blue and green? Turn in clockwise or turn out anti-clockwise?
The heater worked before the surgery so what can we do to fix it?
Any help appreciated .

uno online

The heater control valve regulates the flow of coolant to the heater core. Make sure the valve is open and not stuck closed. Feel the heater hoses with the engine running. Both hoses should be hot to the touch. If one hose is hot and the other is cold, it could mean that the heater core is clogged. The blower motor is what circulates air through the heater core and into the cab. Make sure the blower motor is working properly.

 

[Lincsman]

All Taps on in winter, rear one only off in summer.