Leaking Alpha CD32C

[gassafe]

Hey, don't work on many Alpha's so could do with some pointers on this one I came across today...

It looks to be leaking from the connection onto the main heat exchanger at the bottom of the heat exchanger, is this a common problem? To get better access I'm going to remove the front combustion door & fan which will allow me to clean up the mess it's made in the combustion box.

i can't find the part number for a combustion door seal anywhere! I'm after the vaillant type door seal kit if anyone is familiar!?

 

[mutley racers]

Is that the condensate then that's leaking

 

[mutley racers]

Not in tooting is it?

 

[AMGasServices]

Is it this seal that you're after part no 0020038679 ?

 

[Millsy 82]

Get the seal kit for the boiler not just the burner gasket as there is another inside the combustion door (thin red gasket).

As mutely said check the condense pipe on these. I covered a lot of these on a HA contract and had a few condense pipes go. Also be gentle with it as I've had a couple come apart where the condense pipe joins the condense trap. I think there was a technical bulletin about these boilers and the condense pipes.

 

[Roger Welton]

just saying 🙂

 

[mutley racers]

The one in tooting I had like this I managed to squeeze my hand in with some little wide mouth spanners and put a new washer in it. Mopped up all spillage and was off. I hope this isn't the same one

 

[Alpha man]

If it's leaking from the stainless pipe of the heat ex, either the pipe will need changing, or you may get away with a 22mm fibre washer.

 

[gassafe]

Is it this seal that you're after part no 0020038679 ?

That came back with the vaillant door seal!!!

 

[gassafe]

Not in tooting is it?

Haha, no your okay it's not I'm tooting 😉

 

[gassafe]

If it's leaking from the stainless pipe of the heat ex, either the pipe will need changing, or you may get away with a 22mm fibre washer.

i thought the pipe was copper when I was there, but yes it's the one off the rear of the heat exchanger & it does look like stainless in my pic.

 

[gassafe]

Get the seal kit for the boiler not just the burner gasket as there is another inside the combustion door (thin red gasket).

As mutely said check the condense pipe on these. I covered a lot of these on a HA contract and had a few condense pipes go. Also be gentle with it as I've had a couple come apart where the condense pipe joins the condense trap. I think there was a technical bulletin about these boilers and the condense pipes.

Is this the kit you mean? Seems expensive for a door seal lol! It seems to have all sorts of weird seals in it!

SEAL KIT DHW & MAIN HEAT EX - Gas Appliance Spares (Preston) Ltd

 

[GrahamM]

As Millsy mentions there is an issue with condi pipe on these. It separates at attachment bushes due to weak welds. There is an upgrade part.
Just be sure not that first, as replaced at least 2 last year.

 

[gassafe]

As Millsy mentions there is an issue with condi pipe on these. It separates at attachment bushes due to weak welds. There is an upgrade part.
Just be sure not that first, as replaced at least 2 last year.

I did push my hand up the back of the heat exchanger to check it was all dry up the back as the condense seems to join at the back, I could only see a droplet from the main heat exchanger nut where the fibre washer would be.

The custard did say they did not top up pressure much tho which made me think it might not be on heating side!

 

[Roger Welton]

The old style cond pipes fail on top of the trap i've found.

 

[gassafe]

The old style cond pipes fail on top of the trap i've found.

Is this directly behind the heat main exchanger because that would be a pig to change!!!

 

[Roger Welton]

nope comes off the bottom of the hex, through a gromit and onto the trap.

 

[GrahamM]

Is this directly behind the heat main exchanger because that would be a pig to change!!!

nope comes off the bottom of the hex, through a gromit and onto the trap.

Still a bit of a pig to do.

 

[AlexGas]

Alpha 3.014749 seal kit

You should be able to get better price.

 

[Millsy 82]

Is this the kit you mean? Seems expensive for a door seal lol! It seems to have all sorts of weird seals in it!

SEAL KIT DHW & MAIN HEAT EX - Gas Appliance Spares (Preston) Ltd

Yes and I forgot about the rope seal as well if you take the burner out you need to replace the seals on it. Trust me once you touch it it will start leaking from somewhere else no where near where you have touched.