Mk 7 - Heater (A/C) version - no heat, vacuum ok

[metalworker0]

Often no one is here to answer ..
people come and go .....will answer questions for a couple of days then wont be seen for a week , a month even.

i don't know if this is about to happen

all the best.mark

[Airthies]

Often no one is here to answer ..
people come and go .....will answer questions for a couple of days then wont be seen for a week , a month even.

i don't know if this is about to happen

all the best.mark

No answer can be better and cheaper than a misleading or wrong answer.

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[metalworker0]

Fair enough , tumble weeds would be everywhere in the custom and mk8 forums, if i didn't answer, would be days without answers .. posts going down to the bottom and gone.

all the best.mark

[Airthies]

Fair enough , tumble weeds would be everywhere in the custom and mk8 forums, if i didn't answer, would be days without answers .. posts going down to the bottom and gone.

all the best.mark

See above comment.

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[metalworker0]

if i know the answer then i say so .. my posts often contain --"i think" , "could be" , "may be" "possibly" "not sure", "i say others will answer" (often they don't) and that's what remote diagnostics is about, as you cant be there at the side of them, i almost always say if i'm not sure, if i don't know and its something to go on until someone like you comes along with a sometimes a more complete answer, non of my diagnostics sends them out buying stuff willy nilly, i warn about this all the time. diagnostics is guess work and some posts here, they come here asking questions when garages have failed with the guess work time after time. never getting it right, often costing them thousands. i try to help as best as i can .

all the best.mark

[Airthies]

if i know the answer then i say so .. my posts often contain --"i think" , "could be" , "may be" "possibly" "not sure", "i say others will answer" (often they don't) and that's what remote diagnostics is about, as you cant be there at the side of them, i almost always say if i'm not sure, if i don't know and its something to go on until someone like you comes along with a sometimes a more complete answer, non of my diagnostics sends them out buying stuff willy nilly, i warn about this all the time. diagnostics is guess work and some posts here, they come here asking questions when garages have failed with the guess work time after time. never getting it right, often costing them thousands. i try to help as best as i can .

all the best.mark

If you know the answer to someone's question then that's great share and help that's what it's all about.
But I'll guarantee I'm not the only one that would rather not trawl through regurgitated AI diarrhoea that more often references the US transit rather than the EU or gets people loading the proverbial an unnecessary parts cannon.

If you're going to quote AI why not advise those asking to do that for themselves, which helps them learn more, and with the added suggestion of what to add into their search which will only increase their likelihood of finding the right information as often folk will miss out important info in their posts that sends those that try to help off on a wild goose chase till the OP clarifies a the missing point.

As you have been told before.
Often less is more.
Don't try and fix everybody's problems,
Help others solve their own problems and therefore everyone gets better.


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[Airthies]

Ps. A large part of my job is remote trouble shooting for my customers that are spread across the country from the middle of England to the Shetland Islands and I'm not getting in my van and hitting the road till I've asked more questions than have answers and most of the time I can fix the machine over the phone only by asking pertinent questions and then directing what actions to take.

I'd be sh*t at my job if I got in my van as soon as I got a call without finding out if I needed to go or not regardless whether that machine is 30mins or an overnight ferry away.

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[metalworker0]

I only quote AI .. when it's saying what i wanted to say and i agree with what it says .. and it saves me a lot of typing... think i use this probably in less than 10 percent of my answers.
One day, that's all we will have when forums are gone .
Now most of the very knowledgeable techs on youtube rely on a troubleshooting flow charts to make diagnoses with electronic systems and mechanical systems, they rely on software "Alldata" to find a solution to a problem, 1000's of mechs contribute to this alldata system with problems and their solutions.
It gives data on all faults saying; what percentages the cures were, the tech picks the highest percentage answer .. and it's usually the right solution.

.. That's the way it's going!

As regards answering posts, understand, ive never said anything about some of your less than satisfactory posts. do you want me to errmmm, mention it when you make one?

all the best.mark

[Airthies]

I only quote AI .. when it's saying what i wanted to say and i agree with what it says .. and it saves me a lot of typing... think i use this probably in less than 10 percent of my answers.
One day, that's all we will have when forums are gone .
Now most of the very knowledgeable techs on youtube rely on a troubleshooting flow charts to make diagnoses with electronic systems and mechanical systems, they rely on software "Alldata" to find a solution to a problem, 1000's of mechs contribute to this alldata system with problems and their solutions.
It gives data on all faults saying; what percentages the cures were, the tech picks the highest percentage answer .. and it's usually the right solution.

.. That's the way it's going!

As regards answering posts, understand, ive never said anything about some of your less than satisfactory posts. do you want me to errmmm, mention it when you make one?

all the best.mark

Collecting and collating fault information and solutions is nothing new, JD had a system we were using in the 90s for the exact purpose of sharing across the global brand.

Feel free to point to any of my errors or failures I'm not afraid to admit I'm wrong on the outcome from the information given and had varying results in diagnosis and help within the forum as has many other here.

And forgive me for having a business and life out with the forum that sees me absent from helping others for free in my own time.

[Jp71]

If valve is under vacuum when running, disconnect hose and plug it to hold vacuum to ensure brakes still work.

Was just rereading this, can you expand on the "checking the brakes bit" you mean the van brakes or something else?

[Airthies]

If valve is under vacuum when running, disconnect hose and plug it to hold vacuum to ensure brakes still work.

Was just rereading this, can you expand on the "checking the brakes bit" you mean the van brakes or something else?

If you unplug the valve at the bulkhead so it's not being affected.
The hose is open to atmosphere so vacuum pump is constantly drawing air rather than creating vacuum.
Without the system under full vacuum it will affect your brakes if you drive anywhere.
If you disconnect hose put something in it to plug it and keep the system under full vacuum.

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[Jp71]

So i have

- removed the blend door actuator.
- moved the flap manually to both positions - both with AC on and AC off
- none of the above resulted in hot air coming through into the cab

- i also connected the actuator to the white electrical plug whilst it was not connected to the lever arm thingy and turned the dial - no movement of the actuator

Any thoughts or recommendations? Feel like im chasing my tail and heading towards replacing parts bit by bit until i hit the right part by luck

[metalworker0]

Lets go through it, go over things, as no one has answered, its been hours.

My questions are generic, relating to most systems in most cars and vans and how they work ,.,. they are not specific to the transit you have - just trying help.

You've just proved the actuator flap seems to work when the motor is taken off ........... you could boroscope it inside to see if the door connecting mechanism hasn't broken off inside.
You say the valve that controls the hot water going through the matrix works.

If non of the above .. is the matrix blocked? - have you tried taking the pipes off and flushing both ways...
Has someone done a EGR cooler bypass and mixed up the pipes,
Has someone done an oil cooler bypass and mixed up the pipes,
Has someone bought the wrong thermostat housing for it, some have an extended thermostat inside (diverter) that covers up certain pipe passageways .. is meant for only the layout it came from. and its not unknown for the diverter bit of the thermostat to break and fall off.

all the best.mark

[Jp71]

If non of the above .. is the matrix blocked? - have you tried taking the pipes off and flushing both ways...

Yes, runs clear after flushing

Has someone done a EGR cooler bypass and mixed up the pipes,
Has someone done an oil cooler bypass and mixed up the pipes,
Has someone bought the wrong thermostat housing for it, some have an extended thermostat inside (diverter) that covers up certain pipe passageways .. is meant for only the layout it came from. and its not unknown for the diverter bit of the thermostat to break and fall off.

Nah, i've owned the van for a few years and it only stopped working in the last month or so

Has someone done a EGR cooler bypass and mixed up the pipes,

The EGR isnt the water cooled version so unlikely to be that im guessing

I can only assume something in my analysis to date i've got wring, might have to run through the check list again

[Jp71]

You've just proved the actuator flap seems to work when the motor is taken off ........... you could boroscope it inside to see if the door connecting mechanism hasn't broken off inside.
You say the valve that controls the hot water going through the matrix works.

I can only assume its either water diversion valve behind the firewall or the blend door actuator, through no other reasons that im guessing!!