Baxi 424 2.1 Hot water Temp ?

[Olivias Grumpy]

Hello
I have just had a new Baxi 424 2.1 boiler installed in a rental flat
During commissioning and testing it was a bit long winded to adjust the gas settings.
Eventually we called in a BAXI service tech who set it up with very little fuss, and readings were left as in manual.

However late on Saturday evening my tenant called to inform me that there was no hot water.

I visited and initially found that the temp setting dial was turned very low. I'm pretty sure the Baxi tech set it 55 degrees

I set it to 55 and turned on sink tap full. The boiler display showed temp at about 40 The water from tap was luke warm at best.
I turned tap down to about half flow. Boiler temp climbed to approx 52. The tap water increased in temp, but not as hot as I had anticipated. I could leave my hand under the flow without discomfort.

For comparison the Baxi replaced a Worcester 24cdi, due to diverter valve issue.

When the 24cdi was working well before the diverter issue, the water temp was never an issue.

Has anyone had a similar issue that is easy to adjust? OR should involve Baxi at this point?

Thanks for reading

 

[polesapart]

You can measure the flow rate and the difference between the incoming water temperature and the hot tap temp. Any container of known volume, stopwatch, thermometer.

At 9.8 l/min this should be ΔT35°C for a 24kW combi.

At higher flow rates ΔT will be less.

 

[CountryFan]

What temperature as the Worcester set to?