Hi, my name is ***** ***** I have been in the home improvement and repair field for 20 years. I will be glad to help you today. You should be getting steady hot water and I may have more questions before the answers start coming. The first question will help us determine what the fault code is. Will you tell me which lights are blinking and how many times it blinks and also the colour of the lights that are illuminated and when? For example LED 1 solid green and LED 3 indicates DHW demand and no error. If will tell me what the lights are doing during DHW demand and CH demand and also when no demand and any other conditions that you may discover.
There is only one LED?
If there are 3 lights then I would like to know which light is flashing and if there is only one light will you look on the rating panel for the model number?
There is not a burner status LED, Lockout LED and mode LED? Which light is flashing?
Do you have a multmeter? There is likely a faulty thermistor. The resistance should be 10k ohms.
The reading is approximate depending on temperature. Should be about 10k at 25C.
If you do get a reading near that then replace the thermistor and test voltage across the thermistor and that reading should be about 3.75V
No, you should be getting continuous hot water. Almost certainly the thermistor but that will be determined at your convenience. Take your time. I am online often so just post your findings when you are able.
Basically it is either the thermistor, PCB or wire harness.....the most likely being the thermistor.
I haven't heard from you. Was the information I provided helpful?
The message you sent on 7th January has only just appeared in my inbox. I have not had the chance to check...what I was more concerned about was the operation (as in whether it should be heating / cooling as it is).Am in rented accomodation so have brought it to landlords attention.