rsf100et Hot water does not stay hot.
- Thread starter 1mark2
- Start date
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Possibly just a diaphragm needed and a new 'o' around the pin that pops out for HW operation.
Remove the microswitch and inspect for water ingress. Turn on hot tap and see if pin pops out. If it doesn't then diaphragm gone.
If it does, gently push a small screwdriver into microswitch and see if boiler is activated, if it isn't will be microswitch.
Remove the microswitch and inspect for water ingress. Turn on hot tap and see if pin pops out. If it doesn't then diaphragm gone.
If it does, gently push a small screwdriver into microswitch and see if boiler is activated, if it isn't will be microswitch.
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Dear Gas4you, Thank you for your comment. I will tell the heating engineer who is coming next week what you said. I do not know what the switches look like and could well do more harm than good!Mind you I had one engineer come round who stayed an hour and said it could be the heat exchanger, left and charged me £120
With respect, I never understand why anyone would pay an engineer for doing nothing 
I am also disgusted that he would charge you for doing nothing
I never charge until I have fixed the fault. The above visit would have been FOC and a quote given to fix in my case, or if it was a boiler I did not know, no charge and a recommendation to get the manufacturers out on a fixed price repair
I am also disgusted that he would charge you for doing nothing
I never charge until I have fixed the fault. The above visit would have been FOC and a quote given to fix in my case, or if it was a boiler I did not know, no charge and a recommendation to get the manufacturers out on a fixed price repair
Dear Dave, I will write to the engineer and tell him to specify what he did for the money. He said he ran diagnostic tests. I have now followed your instructions re. switch. Micro switch fires up boiler, pin moves out when hot tap turned on.
As long as the pin is moving out far enough to operate the microswitch, replace it, turn heating off and turn on hot tap to test, then it could be dhw thermister fault, DV stuck as Chris said, or possibly the plate heat exchanger blocked.
All, unfortunately, of which would need an engineer in front of the boiler to diagnose properly.
I would also suggest that in your letter to him you respectfully request that he re attends to fix the problem and whilst you are prepared to pay for any parts, you feel you have paid enough in labour already
Lets hope he is a fair chap
All, unfortunately, of which would need an engineer in front of the boiler to diagnose properly.
I would also suggest that in your letter to him you respectfully request that he re attends to fix the problem and whilst you are prepared to pay for any parts, you feel you have paid enough in labour already
Lets hope he is a fair chap
Ok, Thanks Dave and Chris for your quick responses. We have gone as far as we can without someone seeing the boiler. I will leave things until after Christmas now, at least the house is warm! They are designed to fail at this time of year I suppose. Seasons greetings to you both.
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