Although I put heating on cold/blue relatively lukewarm/hot air flows from
ventilation openings ... I have noticed that there is one very hot box
situated in the center and down from ventilation control in direction to the
pedals behind plastic air openings. Car is Focus year 2000 without air
conditioning I bought it few days ago so I don't know if this is normal for
Focus or there is again some fault on heating radiator.
Heating radiator was repleaced few months ago because of leaking. Old owner
gave me papers from Ford dealer. Can I do anything about this? Maybe some
cold/hot water valveor something like that is not mounted properly? Or?
Also if anyone can comment what should I take most care of on this car good
bad sides etc...
Sounds interesting, just tested this with a small LCD thermometer
putting the outside sensor (cable) directly into one of the
center vents, but can't really acknowledge it. There was no real
difference shown to my outside thermometer (1999 wagon).
For the fun of it turned A/C on to measure and quickly temp
dropped down to 1/1.8 C/F, much more then expected. ;-)
Where's the air for fresh air come from?
I know it comes in from below the windshield, but does that come
Thruogh the egine compartment? or just over the hood, which could still
pick up some heat.
Micheal, your AC cooled it to 1 degree C?
thats almost freexing, I haven't had an AC do that
since I had a freon one in my '86? Tempo, that would put out
about -2C / 29F with recirculate on.
Ops, seems my conversion tool was using F (absolute), should be
33.8F in reality.
The problem might be the heat exchanger as "Dudo" pointed out,
haven't checked about the Focus, but any other Ford owned by me
had some kind of cover you moved with the temp control over the
heat exchanger. There weren't any valves to control refrigerant
From the beginning of my test it was turned complete to cold
air. Perhaps you have to drive longer (30 min.) to measure the
Did took a look today, but things are quite compact and I wasn't
able to find the heat exchanger in second today.
Indeed found the cooling capacity quite respectable, though it
was just 24C outside. But even with outside well >35/95 C/F you
have to turn it off frequently even at low fan speed or you'll
freeze to death quite soon...
Ops forgot to test with recirculate on at all.
Are you sure that there is no any valve that control refrigerant flow? In
that case this could be big design flaw on ford focus if you wan't to drive
it comfortably in hot climates like summers in Croatia are without AC.
Actally heat exchanger is allways hot in my car (you can't hold finger on it
because of temp.) so it seems if everything is as you wrote that we allways
have source of heat (cca. 90-100 degrees C) in the car?
I'm guessing you mean *coolant* flow?
As far as I know, Ford and many others have not used a valve on the heating
system since the 1960's.
It is not a design flaw; there are a number of advantages in this approach.
A flap is used when the temperature is set to the coolest setting to prevent
air passing through the heat exchanger. It may be that yours is broken or
out of adjustment because I have never noticed unwanted hot air coming in
to the car in the seven years I've owned my Focus.
If there is a weakness with the Focus heating/ventilating system it is quite
the opposite. There is insufficient air flow through the car, so it tends
to mist up quite easily. Also, in the coldest weather the heater is barely
This is my experience with Ford, though I haven't checked on my
Focus. Ford uses just the usual thermostat to separate the
radiator, from the circuit if the engine is cold.
This might be well the reason or simply some dust/dirt preventing
to close the flap completely?
IMHO vents are much more likely to break then this simple
Found the heating quite sufficient, though it takes a little time
especially with the wagon if it is really cold.
Indeed, some rain and the Focus fogs up quite fast, even if I
have exchanged a few parts recommended by Ford (TSI - technical
service information), it got a little better but still annoying,
the only thing you can do is turn on heated windscreen and turn
on A/C to get a clear view back...Unluckily it rains quite often
in my area...;(
Don't suppose the reason due to a wrong mounted interior air
filter as some pointed out, as all service has been done by an
official Ford dealer. Though I could double check of course, but
there would be no TSI information and some fix in production if
there wouldn't be a problem.
I agree that simple technology is sometimes much more reliable and I'm sure
that flap is much more reliable then valve but...
I don't know about winter but during summer heating radiator with hot engine
water/coolant at 90-100 degrees C is simply one unwanted source of heat in
the cabin.... at least when gets hot and the car doesn't have AC
Please could you explain me where to find interior air filter in ford focus?
[ simple technology to control Ford heating systems ]
Can't remember any real problem due to the fact, though my Focus
has A/C. From your other contributions it sounds like someone has
worked on the heating system of your car and perhaps left it in a
state you suffer from?
Should be the shown filter, It's rumored to be easily mounted
wrongly, getting wet while raining and some people accuse it as
reason for interior fog? Have never checked about mine, it
doesn't happen any time it rains and I can control it with the
heated windscreen and/or A/C quickly, though it shouldn't happen
in the first place.
Yes they changed cabin radiator because of leaking... few months
ago...probably they didn't do something as they should and hot air gets
in.... and btw. air recirculation switch works randomly... One day it works
another day don't...
Good car but bad mechanics...
Well then maybe is something broken or out of adjustement with that flap in
my focus because ventilation canals get really warm and when temp outside
reaches 20-25-30 C it simply gets too hot in the car...
Please if you have any documentation how to disassemble ventilation system
could you sand me it on my email...
Btw. that 'heating radiator' was changed few months ago at least old owner
said so...maybe they didn't assemble it correctly...
Well I have this car for one week only so have to get a bit colder to check
I live in Minnesota, in the winter when it's above 0F(~-15C) I get heat
within 2-3 miles, and good head within 10mi, and below 0F, I get heat in
about 5 miles, either way I have turned the heat down by the time I get
to work, ~35 miles.
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