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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Central heating controller - replacing
We have a Honeywell Smartfit controller which keeps
crashing showing code F4 on the timer. F4 is 3-port valve stuck but the valve and actuator seem all right. Google suggests this is a common problem and the solution is to replace the controller. First question is, has anyone managed to get a free replacement out of Honeywell? Failing that, can I replace it by a different make? Can I just connect up the boiler, valve and timer the same way or would I need a new timer? Is it even possible to DIY a controller, e.g. given a microcontroller board and some relays? Being able to fine-tune the heating program would be great. |
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Central heating controller - replacing
"Al Grant" wrote in message ... We have a Honeywell Smartfit controller which keeps crashing showing code F4 on the timer. F4 is 3-port valve stuck but the valve and actuator seem all right. Google suggests this is a common problem and the solution is to replace the controller. First question is, has anyone managed to get a free replacement out of Honeywell? Failing that, can I replace it by a different make? Can I just connect up the boiler, valve and timer the same way or would I need a new timer? Is it even possible to DIY a controller, e.g. given a microcontroller board and some relays? Being able to fine-tune the heating program would be great. What sort of fine tuning are you considering - a programmable room stat is very useful. |
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