Can any one suggest a reason why my Remeha comby cannot supply hot water at the correct temp anymore - its seems to try and goes luke warm. The central heating works fine!!
Remeha hot water problem
- Thread starter JSmith125
- Start date
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1. Any Error (E) numbers on the display?
2. What sequence of numbers do you get when the HW is turned on?
3. Which number is displayed when the water goes cold?
4. What is the t1, t2 and t3 temperature? (Press the + key to display t1 followed by a number - that's the temperature. Press + again for t2 and t3)
5. What external controls do you have?
2. What sequence of numbers do you get when the HW is turned on?
3. Which number is displayed when the water goes cold?
4. What is the t1, t2 and t3 temperature? (Press the + key to display t1 followed by a number - that's the temperature. Press + again for t2 and t3)
5. What external controls do you have?
Scaled plate HE or Thermistor fault neither of these will bring up a code every time 
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Scaled plate HE or Thermistor fault neither of these will bring up a code every time
Thanks - whats is a scaled plate HE and can it be easily descaled, and is there only one thermistor?
There are 2 thermistors, one on the boiler flow, the other on the return (behind the fan)
I personally do not descale Plate HE's (some on here do though!)
I personally do not descale Plate HE's (some on here do though!)
There are 2 thermistors, one on the boiler flow, the other on the return (behind the fan)
I personally do not descale Plate HE's (some on here do though!)
Ok - I am obviously a novice and have just realised that HE = heat exchanger, Im pretty sure this is ok as the boiler is only 3 years old. I checked the service manual, and couldnt see any mention of thermistor - does it have another name and how do you check the operation or do just replace and see what happens?
When HW is called the sequence should be 0, 1, 2, 4.
0, 1, 2, 3 means that heating has been called.
It sounds as if the boiler is not switching over to HW.
Sorry I remembered it incorrectly - it is showing 4 for HW and 3 for CH.
Then it's back to a blocked heat exchanger.
Do you live in a hard water area? If so, it might be a good idea to fit an anti-scale device on the cold water feed to the boiler.
Yes I do unfortunately....
Ask Remeha for their recommendations on in-line anti-scale devices.
Ok Ive had someone look at the boiler and its probably the HE scaled up, as the boiler was functioning correctly. So it would seem I need to replace the HE (or clean it) and get an inline filter.
Ordered a plate exchanger - is this a difficult job to change, does the water pump have to taken out - what else should I be wary of?
The man who sorts you boiler may want paying.
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