Hi
I've been having issues for some months with our RD532 boiler. 2 different engineers have been unsuccessful in diagnosing the fault.
Here's what happens. When a hot tap is turned on the boiler fires up but very quickly over heats. The temperature gauge on the front the shoots straight up to 99 in the space of a few seconds (the temp selector on hot water dial is set at minimum). When you take the cover off you can see steam and bubbling escaping from the boiler core. The boiler will then shut itself off. The hot water will stay in the boiler for a few minutes and then with a bit of banging the hot water gets released into the radiators.
However this doesn't happen every singe time. It's all a bit random. Generally, once it over heats, I'll leave it for a few mins then try and again and 7/10 times it will give me steady hot water.
The first engineer to visit changed the diverter valve but this didn't help. The next one put a new heat exchanger on which also hasn't helped.
There must be a way to diagnose the fault without randomly changing parts until something works. The first guy wanted to try changing the electronics/mother board but wasn't sure if that's where the fault is...and at £400+ I don't want to try it unless it's going to work.
Any ideas please ? I could post a video of it if that helps.
Many thanks.
I've been having issues for some months with our RD532 boiler. 2 different engineers have been unsuccessful in diagnosing the fault.
Here's what happens. When a hot tap is turned on the boiler fires up but very quickly over heats. The temperature gauge on the front the shoots straight up to 99 in the space of a few seconds (the temp selector on hot water dial is set at minimum). When you take the cover off you can see steam and bubbling escaping from the boiler core. The boiler will then shut itself off. The hot water will stay in the boiler for a few minutes and then with a bit of banging the hot water gets released into the radiators.
However this doesn't happen every singe time. It's all a bit random. Generally, once it over heats, I'll leave it for a few mins then try and again and 7/10 times it will give me steady hot water.
The first engineer to visit changed the diverter valve but this didn't help. The next one put a new heat exchanger on which also hasn't helped.
There must be a way to diagnose the fault without randomly changing parts until something works. The first guy wanted to try changing the electronics/mother board but wasn't sure if that's where the fault is...and at £400+ I don't want to try it unless it's going to work.
Any ideas please ? I could post a video of it if that helps.
Many thanks.