Boiler fault F 20

[Lukas677]

Hi everyone, I have problem with my boiler
HEAT LINE CAPRIZ PLUS 28
I have error code on screen F 20
In manual instructions is
F 20 : Overheating fault , Overheating safety device activated (97°C)
What I should to do ?

Lukas, Hemel Hempstead

 

[Aquarius]

Any work carried out recently?

 

[ShaunCorbs]

Pressure in the system above 1 bar ?

 

[Lukas677]

Pressure is 1.5 bar

 

[Lukas677]

Some very weird sounds coming from boiler when is hot water on and pressure rises to 2 bar after boiler stop working and show F20 fault on screen, and is off after this

 

[Aquarius]

Again, any work carried out recently?

 

[gmartine]

Pressure is going to rise when it's on and working. Could be a number of things... faulty pump being one, best get someone in for a proper diagnosis.

 

[Lukas677]

drained the water from the C H system to ad one radiator
After I filled up as always, and this happened next day .
All valves are open.

 

[ShaunCorbs]

Air lock turn all but the closest rad to the boiler off on the trv (helps if it’s higher than the boiler) then turn the heating on but turn the temperature down on the boiler (heating)

 

[Aquarius]

As above and check bleed vents for air. And the boiler isolation valves are open?

 

[Markusmk]

Some very weird sounds coming from boiler when is hot water on and pressure rises to 2 bar after boiler stop working and show F20 fault on screen, and is off after this

Hi Lukas I have the same error, how did you solve this?

 

[Deleted member 120897]

Hi Lukas I have the same error, how did you solve this?

Have you checked against any advice given in the thread?

 

[Markusmk]

yes and I cannot find anything, I purged radiators but I have F20 error without using heating, just hot water? Any advice?

 

[Markusmk]

boiler was working fine for hot water, I tried to use heating and couldn't make it work. Next day f20 error for hot water

 

[ShaunCorbs]

What boiler do you have ?

Also two tanks in the loft one big one and a small one?

 

[Deleted member 120897]

Are both flow and return open under the boiler? Any other valves that could be closed, such as a magnetic filter?

 

[Markusmk]

Guys so plumber said pump needs replacement, I found one from ebay it says compatible
My pump
Grundfos UPS0 15-50 PN 98376839
Ebay
Groundfos
UPS0 15-60 PN 59506281
Power and all specs are the same

compare — Postimages

postimg.cc

I have other vendors confirmed even bosch one would work. What you think, price from ebay is very good

 

[Chuck]

What you think, price from ebay is very good

I don't think buying cheap 'compatible' boiler parts from eBay is a good idea. Only genuine manufacturer-approved parts should be used inside a boiler IMO.

 

[Markusmk]

I don't think buying cheap 'compatible' boiler parts from eBay is a good idea. Only genuine manufacturer-approved parts should be used inside a boiler IMO.

Well there is not stock anymore for specific boiler model I have and this one was confirmed by boilerparts.co.uk
"Only genuine manufacturer-approved" aren't they from the same manufacturer?

 

[ShaunCorbs]

What’s the boiler ?

 

[Deleted member 120897]

Well there is not stock anymore for specific boiler model I have and this one was confirmed by boilerparts.co.uk

Assuming same as Op and I have correct one, pump definitely still available at a nice price of £249.99.

 

[king of pipes]

Ouch cheap boilers are always expensive on parts, if pump failure has been diagnosed then it needs replacing I'm afraid , truthfully it should be carried out by a GSI the casing forms part of the room sealing from products of combustion,
Once the pump is replaced refilled and vented the whole boiler and it's safety devices need testing and a flue gas analysis done . Kop

 

[Lou]

(Just bumping a few older threads, they will drop off what is new soon)

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