Hot water from Valliant Boiler

[Margaret T]

A brand new valliant ecotec 618 boiler was installed less than 6 months old. We started experiencing no hot water from the 4th month. The only way to have hot water is by having both the heating and hot water switched on together. Given hot weather in the UK last week, we switched off the heating but then found there to be no hot water. Or the alternative way to have hot water is leaving the immersion switch on constantly.

My questions are:
1. Is this correct?
2. Should the immersion switch be on constantly?
3. Must both heater and hot water be switched on together in order to get hot water? We don't need the heater on especially in the summer months.
4. What could be the problem?

Any ideas, please?

Thanks a lot

Margaret

Background
The Valliant boiler located kitchen ground floor is connected to a blue hot water cylinder on the first-floor air cupboard. A new hive system controller.
On installation, whole house new radiators were installed and power flushed, 2 new zone valves plus magnetic filter installed. Both the valiant and hive is brand new. The boiler was installed first. Then the hive was set up afterwards and runs on schedule (e.g. morning 0645am - 0800am) and evening - as not needed during day time as not at home).

From September 2018 to December 2018 - everything was working fine.
January 2019 - there was an airlock
February 2019 - the person replaced a syncron motor on the heating valve
March 2019 - says to keep the immersion on constant
- we switched off heating but then hot water stopped

19/04/2019 - Called British Gas and they replaced the valliant PCB board
23/04/2019 - Valliant attended and looked at Boiler and says no issue with the boiler
24/04/2019 - Still no hot water when heater switched off - British Gas came and can't diagnose the issue.

I wish I kept the existing boiler rather than change to this new valiant with the hive. Everything before was working perfectly until the above.

 

[Scott_D]

Three port valve

 

[AMGasServices]

Welcome just a few things I’d like to ask before What kind of system do you have ?
Please can you also add some pictures.

Thankyou

AMG

 

[Aire]

Agree with Scott, possibly your 3 or 2 port zone valve at fault. The boiler is new but chances are the external controls/valves wasn't changed at the same time

 

[Burger]

Agree with Scott, possibly your 3 or 3 port zone valve at fault. The boiler is new but chances are the external controls/valves wasn't changed at the same time

Think he means 2 or 3 port valve(s)?

 

[Burger]

A brand new valliant ecotec 618 boiler was installed less than 6 months old. We started experiencing no hot water from the 4th month. The only way to have hot water is by having both the heating and hot water switched on together. Given hot weather in the UK last week, we switched off the heating but then found there to be no hot water. Or the alternative way to have hot water is leaving the immersion switch on constantly.

My questions are:
1. Is this correct?
2. Should the immersion switch be on constantly?
3. Must both heater and hot water be switched on together in order to get hot water? We don't need the heater on especially in the summer months.
4. What could be the problem?

Any ideas please?

Thanks a lot

Margaret

Answers to your questions.
1. This is not correct, but an underlying fault.
2. Immersion needs to be switched on for as long as you need hot water and it’s heated.
3. They will be needed to be on if you don’t want to use your immersion heater, but do require hot water.
4. A good few replies already, probably a 3 port mid position valve, if this wasn’t changed at the same time as new boiler.

My questions to you are the same as AMG

 

[Margaret T]

The Valliant boiler located kitchen ground floor is connected to a blue hot water cylinder on the first-floor air cupboard. A new hive system controller.
On installation, whole house new radiators were installed and power flushed, 2 new zone valves plus magnetic filter installed.

 

[Old Account]

The Valliant boiler located kitchen ground floor is connected to a blue hot water cylinder on the first-floor air cupboard. A new hive system controller.
On installation, whole house new radiators were installed and power flushed, 2 new zone valves plus magnetic filter installed.

Have got a couple of pictures for us ?

 

[Aire]

If youve had everything new, then as everything is only 6 months old i would call the engineer back who installed it as it's still under warranty.

 

[Burger]

Have got a couple of pictures for us ?

I think she’s edited the OP and now there’s pics.