Air Blower Not Kicking Out Much Air

[tampenny]

Haven't come across a topic for this issue, not sure if that's a good or bad thing,

the air blowing motor is working fine on all settings but doesn't appear to be pushing the air out of any of the vents very well at all, when it's on full you would think it is on the lowest setting,

i've felt inside the motor housing and it appears to have two flaps (windscreen and dash i guess) and an opening for the foot wells, don't know if these aren't opening properly, would sound the obvious problem,

anyone have any knowledge/further ideas please ??

cheers,

[paul.h]

Could be the pollen filter is blocked and needs replacing or at least removing and any debris vacuuming off as well as in the space where it fits. I would check for a good airflow with the air flow directed to the dash vents.

 

Does the blower sound to be going faster when the speed setting is increased ?

[tampenny]

Hi Paul,

thank you,

yes the motor is working fine had it out of the housing to test it,

tried it just on the dash vents which is what first alerted me to the issue,

will have a look at the polllen filter as you suggest,

you have always come up trumps before so fingers crossed again.

Mark.

[tampenny]

Paul,

the pollen filter was a disgrace.....needs changing for sure,

there was a terrific amount of air blowing from the pollen filter housing when it was empty,

so things seem ok up to that point,

took the end off the pollen filter so as i could seal the housing back up and the flow through the dash vents

seemed a tad better but still not as good as i would expect,

will get a new filter and see where we go from there,

thank you again.

[coastline taxis]

has yours got the climate control with the electric motors to control the air direction as these are a very common fault and do exactly what yours is doing when they break

[tampenny]

I honestly have no idea,

how would i find out please ?

this car has way too much going on for a simple man like me to comprehend,

all i can say is after changing the pollen filter there is more air flowing through the vents

so would hope it is job done, 

maybe because it is a sophisticated french piece it doesn't blow as strongly

as say my previous pugs did !

gents, thank you again for your invaluable assistance.

[paul.h]

I suspect you have climate control since in a previous post you mentioned heated seats which tend to be on the dearer models. With climate control you set the temperature on the heater panel and the temperature is automatically controlled with electric motors adjusting the heating flaps. In a manual system you move levers/dials to adjust the heating flaps.

 

This is from the common problems pinned topic with some help on the climate control heating flap motors:

10. The air conditioning only gives cold air at one side or does not cool much.

The evaporator matrix cooling the air on the C5 is long and if the amount of refrigerant is low then there will not be enough to cool all the matrix for both sides of the cabin. First step should be a regass then if that does not work and there are no leaks then look at replacing the air flap control motors. A regass may be about £50, a flap new motor about £60. It could also be damage to the air flap shaft motor fitting - see this post http://www.citroen-o...c5-2002-aircon/ . I had to have both C5s regassed when about 7 years old, on the second one there was a printout that showed there was only 93 g of refrigerant left and that 525 g were put back in yet the air con was working and gas could be heard going through the pressure control valve but the air was not cooling much.

 

Also have a look at this topic for a possible fix to a broken heater flap connection http://www.citroen-o...or-air-bag-ecu/

 

Have a look at this topic for alternative ways to fix the broken flap connection by extending the motor spindle using one from another motor or buying a motor already with an extended spindle http://www.citroen-o...ulation-aircon/

 

Have a look at this topic for a case where a new comms 2000 unit fixed the manual air con not working http://www.citroen-o...-manual-aircon/

 

 

[tampenny]

Paul,

thank you very much,

i stopped a guy today in a C5 and cheekily asked him to demonstrate his air blower,

it blew like a hurricane compared to mine...so guess this flap thing is the problem,

will scrutinize the info and links you have supplied and see where we go.

thank you very much again. 

[tampenny]

Paul,

the second link you detailed above

http://www.citroen-o...or-air-bag-ecu/

just takes me to the main topic page

unless I am missing something.....

Mark.

[paul.h]

The link must have changed. Try this http://www.citroen-owners-club.co.uk/citroen/topic/22652-c5-v6-problems-and-fixes-exhaust-heater-flap-motor-air-bag-ecu/

[tampenny]

Paul,

thank you again,

I am now very confused....are the flaps in the motor housing (two, above where the resistor pack is)

the ones for the vents or not ?

the links seem to suggest it is passenger side with a black star shaped thing !!

totally baffled by this,

please help !!

[tampenny]

Paul,

the two motors by passenger side footwell (top vent and bottom heat)

I am convinced are both working fine,

what i'm not convinced is the blowing as good as it should be,

could it just be because it is climate controlled and it doesn't blow as hard ?

or could there be another avenue for me to explore ?

cheers

Mark.

[paul.h]

Possibly the motors are ok but if a flap has broken from the motor shaft then maybe the flap has moved to a position that blocks the air flow. If you remove the motors you could try moving a flap by hand to see if the air flow increases.

 

With the pollen filter out you could use a mirror/torch and see if the evaporator matrix is blocked with leaves or possibly mould (does the air con smell just after stopping the air con but keeping the blower on ?). Every year or so I disinfect the evaporator matrix to remove the mould by using a garden spray and lance kept just for this purpose and spraying it with Dettol non bleach anti bacterial surface cleanser https://www.google.co.uk/search?q=dettol+surface+cleanser&hl=en-GB&rlz=1T4DKUK_enGB242GB242&tbm=isch&imgil=ZjAUA8tiGYyh3M%253A%253BaO_n7OTipV7PvM%253Bhttp%25253A%25252F%25252Fwww.poundland.co.uk%25252Fdettol-surface-cleaner-440ml&source=iu&pf=m&fir=ZjAUA8tiGYyh3M%253A%252CaO_n7OTipV7PvM%252C_&biw=1138&bih=835&usg=__SnZwml5YDd3h1M_ZN1UXd1tYNKY%3D&ved=0CGQQyjc&ei=fg-MVYayC4qdsgHe1aHACQ#imgrc=ZjAUA8tiGYyh3M%253A%3BaO_n7OTipV7PvM%3Bhttp%253A%252F%252Fwww.poundland.co.uk%252Fmedia%252Fcatalog%252Fproduct%252Fcache%252F1%252Fimage%252F370x%252F9df78eab33525d08d6e5fb8d27136e95%252F7%252F4%252F74139_2.jpg%3Bhttp%253A%252F%252Fwww.poundland.co.uk%252Fdettol-surface-cleaner-440ml%3B370%3B370&usg=__SnZwml5YDd3h1M_ZN1UXd1tYNKY%3D

[tampenny]

Possibly the motors are ok but if a flap has broken from the motor shaft then maybe the flap has moved to a position that blocks the air flow. If you remove the motors you could try moving a flap by hand to see if the air flow increases.

 

 

 

Paul,

forgive me for seeming dense but by this do you mean taking both the small motors off

then turning the black star shape they fit into by hand ? also where do i find the motor shaft please ?

I'm sure it is perfectly described in plain english but this is a source of much confusion for me !

sorry to be a pain.

Thank you again.

[paul.h]

That is the idea to remove the motors and turning the star shape by hand. By motor shaft I meant the star shape on the motor. In one of the links from above http://www.citroen-owners-club.co.uk/citroen/topic/21119-c5-2002-aircon/ , citrophile explains what needs to be done.

[tampenny]

brilliant Paul,

thanks again,

I'll give it another go and report back.

[tampenny]

so....i have removed both motors on the passenger side,

checked they are working,

checked the flaps are opening by turning black star shape,

checked the evaporator matrix is clean and appear to be no further forward,

are there also two similar motors on the drivers side please ?

have stuck my head under there but nothing seems obvious

apart from what looked like a large white crescent shaped thing with teeth

but that could be a horrific image of an ex girlfriend,

i must be at least half way to solving it by now !!!!!!

thank you again

[paul.h]

When you turned the flaps was there any increase in the air flow ?

 

There are similar motors on the driver's side but these are hard to get at and if the air flow did not change on the passenger side then the flaps may not be the problem.

[tampenny]

Paul,

there was no increase in air flow at all when the flaps turned,

i removed the blower motor and pollen filter again just in case

something was wrong there but sadly not....sigh !!

looking forward to your next instruction,

over and out.

[paul.h]

Are you sure the flaps moved and not just the star shape ?

 

If the flaps did move and you can not find anything that is blocking the flow and the blower is working and the ducting to the various vents is connected and the dash vents are open, then I can not think of anything else.

[citrophile]

What year and model do you have?

Are you saying that the blower speed increases and decreases when you change the control but that there is no effect? Can you hear the blower quite loudly?

You say you have had the blower motor out, does it run fine and change speed when it is out?

Have you checked the air intake under the bonnet to make sure it is not blocked?

I have had the whole heater aircon system out of a C5 and stripped down and the system cannot completely shut off airflow with the flaps only divert it to different outlets

It is possible that either the evaporator, heater matrix or additional electric heater unti are blocked, especially if the car has previously been run without a pollen filter as that is the only filter anywhere in the system

[tampenny]

Hi,

 

What year and model do you have? it is an 04 plate 2.2 hdi exclusive diesel estate.

Are you saying that the blower speed increases and decreases when you change the control but that there is no effect? yes the blower speed increases/decreases and there yes is an effect, the problem is at full blast the air blowing out is weaker that i would expect, i checked it against another identical model and there was much more air flow on that one.

Can you hear the blower quite loudly? yes.

You say you have had the blower motor out, does it run fine and change speed when it is out? Yes absolutely, i took the pollen filter out to change it and the air from the motor in that little chamber was terrific.

Have you checked the air intake under the bonnet to make sure it is not blocked? No,do you mean below the air filter ?
I have had the whole heater aircon system out of a C5 and stripped down and the system cannot completely shut off airflow with the flaps only divert it to different outlets terrific you are the man to guide me to success then.
It is possible that either the evaporator, heater matrix or additional electric heater unti are blocked, especially if the car has previously been run without a pollen filter as that is the only filter anywhere in the system am i correct in the assumption then that: the air from the motor flows down to the pollen filter housing, goes through the filter then the matrix into the outlets ?? as between the pollen filter and vents is where my problem seems to lie.

Thank you for jumping on board with this one.

 

 

[tampenny]

Are you sure the flaps moved and not just the star shape ?

 

If the flaps did move and you can not find anything that is blocking the flow and the blower is working and the ducting to the various vents is connected and the dash vents are open, then I can not think of anything else.

Paul,

yes the flaps were moving,

i'm going to investigate flow blockage

would i be correct in assuming that after the matrix in the pollen filter housing

there are only ducts that lead to the vents ?

[paul.h]

Between the pollen filter and the vents is the air con evaporator matrix that cools the air, the heater matrix, a flap to direct the air through the heater matrix or around it and then the flaps to direct the air to the vents.

 

The outside air intake is located under the windscreen scuttle and on the mark 1 C5 right hand drive cars can collect rain from one of the wiper grommets and also from the windscreen and let it run in to the driver's footwell.

[tampenny]

Cheers Paul,

is it possible to examine the flaps around the matrices ?

i have no issue with hot or cold so the final flap could well 

be the culprit,

will have to get the vac on the outside air intake

seems to think it is a plant as it has a number of leaves on it.