Since I moved into my new house, I've had a problem with the water temperature either wildly fluctuating or no hot water at all. I had the boiler checked out, the chap told me the domestic heat exchanger (dhe) needed replacing, suggested I fit a magnaclean and try some X400 to prevent the problem in future. He got the system working temporarily and went.
Anyhow, the system went again (hot water of wildly varying temperature) and so I decided to have a go myself. I removed the dhe, tried giving it a good clean, replaced it and tried firing the boiler up - it wouldn't work - no flame for heating or water. I spent the best part of a week without hot water before the engineer could get to me.
Here's the thing. When he came, he said he couldn't find a problem. I didn't give it much thought at the time. I assumed he had tweaked something, as the system was now working, so left it at that.
Now last week, the system went again. No hot water. Last Monday, working an the advice of the original engineer, I drained the system, fit the magnaclean, changed the dhe, added the X400 and topped the system up again. When I tried to use the hot water and heating - nothing - as before. I left the boiler switched on (so I could try periodically for hot water), but also left the heating timer on, set to come on every day at the same time.
Now, 3 days later, I return from work to find that the boiler is working away merrily and the house is nice and toasty. Not only that, I was able to get the best shower I've had for ages (and, ahem, the only for several days since the problem arose - washing in a sink of boiled water is not fun).
And so I get to my question. Why, on two occasions after I have worked (as described) on the system, has it not worked until several days later? In a couple of weeks, I will need to drain it again to clean out the X400, so I could do without this happening again.
The boiler is a Vokera Maxin 24e. Any suggestions would be gratefully received.
Ta Muchly.
Anyhow, the system went again (hot water of wildly varying temperature) and so I decided to have a go myself. I removed the dhe, tried giving it a good clean, replaced it and tried firing the boiler up - it wouldn't work - no flame for heating or water. I spent the best part of a week without hot water before the engineer could get to me.
Here's the thing. When he came, he said he couldn't find a problem. I didn't give it much thought at the time. I assumed he had tweaked something, as the system was now working, so left it at that.
Now last week, the system went again. No hot water. Last Monday, working an the advice of the original engineer, I drained the system, fit the magnaclean, changed the dhe, added the X400 and topped the system up again. When I tried to use the hot water and heating - nothing - as before. I left the boiler switched on (so I could try periodically for hot water), but also left the heating timer on, set to come on every day at the same time.
Now, 3 days later, I return from work to find that the boiler is working away merrily and the house is nice and toasty. Not only that, I was able to get the best shower I've had for ages (and, ahem, the only for several days since the problem arose - washing in a sink of boiled water is not fun).
And so I get to my question. Why, on two occasions after I have worked (as described) on the system, has it not worked until several days later? In a couple of weeks, I will need to drain it again to clean out the X400, so I could do without this happening again.
The boiler is a Vokera Maxin 24e. Any suggestions would be gratefully received.
Ta Muchly.
