Very weak blower/fan - 993

[Ocho]

Hello all

Not a biggie, but the fan for the heater in my 993 is very weak. Does anyone have any experience of this and what might need changing? I'm assuming it's probably the heater motor itself, but could it be anything else before I get stuck into that (at unnecessary expense, too)

thanks all

[supersport]

I bet it’s not the same as the older cars. You used to be able to get just the motor itself that lived under the bonnet, cost about £96 ( probably more now) but not from Porsche.

Porsche would only sell the whole housing at £400 and again I bet these are scary now,

[Orangecurry]

Get in touch with Tore.

https://www.bergvillfx.com/

[Burrow01]

Ocho said:

Hello all

Not a biggie, but the fan for the heater in my 993 is very weak. Does anyone have any experience of this and what might need changing? I'm assuming it's probably the heater motor itself, but could it be anything else before I get stuck into that (at unnecessary expense, too)

thanks all

Its probably the blower motor, they are available, £196 each, unfortunately the work to replace them is extensive - fuel tank needs to be removed to get to them. I just had both of my blower motors replaced due to seized bearings, bill was approx £1000

[Sandy59]

I had a similar issue with my Mini, turned out to be the pollen filter was choked up so a very simple fix, worth checking maybe ??

[Ocho]

Burrow01 said:

Its probably the blower motor, they are available, £196 each, unfortunately the work to replace them is extensive - fuel tank needs to be removed to get to them. I just had both of my blower motors replaced due to seized bearings, bill was approx £1000

Ouch!

[gareth h]

Sandy59 said:

I had a similar issue with my Mini, turned out to be the pollen filter was choked up so a very simple fix, worth checking maybe ??

I had this on my 968, pull the filter and see if that improves things

[Ocho]

Thanks for the suggestion. I've ordered a pair of new filters - regardless of whether this is the issue or not I'm pretty sure they'll be due for a change anyway.

I'll report back...

[A993LAD]

Hi

I changed my right front blower motor last year. It was much easier than I expected. I could have done both whilst I was in there.

There are great instructions online. I'll find the link and post it here tomorrow.

You definitely don't need to remove the fuel tank.

I also found a good supplier for replacement fans. Again I will post a link.

[A993LAD]

Right, just follow these instructions.

They are step by step with photos you really can't go wrong.

https://www.pelicanparts.com/techarticles/Porsche-...

I bought my replacement blower fan here...........

https://www.heritagepartscentre.com/uk/96457201601...

https://www.heritagepartscentre.com/uk/96457201501...

Although I see both left and right are currently out of stock. I think they were out of stock when I needed one but they got one in quite quickly for me.

You should be able to discern which one isn't working by raising the hood and listening to each side up near the windscreen.

[Ocho]

Thanks very much.

Curiously I was following this listing on Ebay, but it looks very different to the blower your link goes to???

https://www.ebay.co.uk/itm/235379098451?mkcid=16&a...

[Burrow01]

A993LAD said:

Right, just follow these instructions.

They are step by step with photos you really can't go wrong.

https://www.pelicanparts.com/techarticles/Porsche-...

I bought my replacement blower fan here...........

https://www.heritagepartscentre.com/uk/96457201601...

https://www.heritagepartscentre.com/uk/96457201501...

Although I see both left and right are currently out of stock. I think they were out of stock when I needed one but they got one in quite quickly for me.

You should be able to discern which one isn't working by raising the hood and listening to each side up near the windscreen.

Wish I had seen that before I paid the bill for the replacement of mine...

[A993LAD]

Ocho said:

Thanks very much.

Curiously I was following this listing on Ebay, but it looks very different to the blower your link goes to???

https://www.ebay.co.uk/itm/235379098451?mkcid=16&a...

That is the rear blower fan and it's housing. It sits above the engine and blows the hot air to the front. Where it then gets boosted into the cabin by the 2 fans in the bulkhead.

The engine one is both cheaper to buy and easier to replace. But the front ones are not too difficult if you follow the Pelican instructions.

BTW I didn't have the special tool to remove the fan so I just used a couple of flat blade screwdrivers as they suggest. You can look at the new fan to see the plastic tabs you are trying to push back with the screwdrivers.

[mlsporsche]

Ocho said:

Thanks very much.

Curiously I was following this listing on Ebay, but it looks very different to the blower your link goes to???

https://www.ebay.co.uk/itm/235379098451?mkcid=16&a...

Thats the rear heater fan in the engine bay

[Ocho]

A993LAD said:

That is the rear blower fan and it's housing. It sits above the engine and blows the hot air to the front. Where it then gets boosted into the cabin by the 2 fans in the bulkhead.

The engine one is both cheaper to buy and easier to replace. But the front ones are not too difficult if you follow the Pelican instructions.

BTW I didn't have the special tool to remove the fan so I just used a couple of flat blade screwdrivers as they suggest. You can look at the new fan to see the plastic tabs you are trying to push back with the screwdrivers.

So if the filters aren't the issue, I presume my problem be either one of these two fan types (engine bay fan or bulkhead boosters)? I guess just turn it all on and have a close listen to see which are working?

[A993LAD]

The one in the engine compartment is really easy to check. Turn the heater onto warm with the fan on 3 or 4 then check the blower is running at high speed at the back. It's easy to access and you could probably open the housing to be doubly sure, although I've never had a problem with mine so haven't needed to.

The front ones are also pretty easy to check, either by listening to them or checking the air being blown into either side of the cockpit.

I changed my drivers side one because, although it was blowing well, I could hear the bearing was on it's way out at slow speed. The service guy said it would seize and then I'd struggle to clear condensation on the drivers side of the windscreen.

[Ocho]

OK, so I got round to having a listen and the fan in the engine bay wasn't working at all. Looking a little closer it didn;t take long to see why - it's not connected.

There are two loose connections, one of which was very obvious, the one indicated by the green arrow (now connected again). The fan now works and blows much stronger inside the cabin. However, after turning everything of, the blower remains on. I thought this might be just a "coolinf the engine down post-drive thing, but 10 mins or so later it's still going.

So I'm going to go out on a limb and say this is possibly due to the other connector (red arrow) that is still not connected to anything and is possible something to do with controlling when it switches off.

Can anyone offer any advice on where this one should connect to and whether this is my problem or if there is something else - quite possibly there is and that's why they were both disconnected???


EDIT - a couple of minutes later and it DID turn off. Starting up again it all works as it should still (just in case perhaps it had turned off because something had burnt out or the fuse had gone). So that's ok, but the mystery of the other connector remains...

Edited by Ocho on Saturday 13th January 14:30

[mlsporsche]

Wiring harness recall means there will be spare sockets that arent used. All is good with your car!

[Ocho]

mlsporsche said:

Wiring harness recall means there will be spare sockets that arent used. All is good with your car!

That makes sense as I found a couple of other “spares” dangling around. I’ve secured them better.

Thanks very much - nice to have it blowing again.

Now about changing those pesky pollen filters…

[Ocho]

So I've changed the pollen filters. No idea how long ago they were last changed. I bought new ones, but it turns out there was a pair of them in a box of bits that came with the car 5 years ago - didn't realise they were there or I could have saved myself a few quid!

Anyway, Photos attached - the one on the left is one of the stored but presumably new ones. The one I've taken out is clearly dirtier, but not significantly I don't think, but then I've never seen one before. Thoughts???