Combi conversion nightmare

[Scott_D]

I have given up
Will try again tomorrow

 

[Millsy 82]

Have you got the new flow going up the old flow?

A lot of people struggle with y and s plans so if they messed it up they may have put a non return valve in which if you have the flow and return the opposite way round won't work.

 

[Scott_D]

Yeah the flow and return are correct at the boiler

I’m baffled

 

[Last Plumber]

I removed the cylinder and piped the flow from the boiler to the flow out to the rads
I capped the cylinder return and stuck an air vent on but it wont circulate

It might be a numb question so excuse me (haven't seen it) but there's no high point to air lock in the connection from primary flow to CH flow to rads is there?

 

[Scott_D]

It might be a numb question so excuse me (haven't seen it) but there's no high point to air lock in the connection from primary flow to CH flow to rads is there?

I put a vent in the airing cupboard
The only thing I can think of is the tenants went round with a spanner and shut off all the rads

 

[Last Plumber]

I put a vent in the airing cupboard

I read it like you'd put it on the return!
My apologies, it is on the highest point of the flow connection is it?

As long as it can't trap air, it should work. Sounds strange.

 

[Scott_D]

I left it like this in the airing cupboard
Then linked the primary flow and return on the stumps for vents and the heating circulates to to the airing cupboard and back to the boiler
The rads dont heat

 

[Scott_D]

I took up some boards under where the cylinder was sat but couldn’t see the rad return anywhere

 

[Scott_D]

It can’t have ever worked properly

 

[ShaunCorbs]

Return not linked?

 

[Scott_D]

Return not linked?

No

 

[Harvest Fields]

😱😱🙄