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An Accenta is a budget system so you get what you pay for. This is irrelevant to the advice for having the system serviced. If you don't have some technical knowledge you are not going to be able to locate the tamper in the first place, the tamper fault could be any component in the system. While your fix may work, possibly better than the original design, it looks pants. There is no way you can justify this type of fix for a paying customer. Any installer would rip the panel out and fit something decent if it was there own system.

I have an Accenta Mini Gen4 alarm and also recently also had the Tamper Fault Lockout message. Certainly I was partly to blame as I had moved the location of the key pad and to do that, had to remove the cover. After all the expert advice (get and expert to service the alarm / buy a replacement keypad / passed its design life / etc) I managed to cure the problem myself. As far as I can see, the keypad case is very poorly designed; the two tabs at the top and the screw fitting at the bottom are not really designed to the absolute minimum strength required. Because I had removed the bottom screw, when replaced, it did not fully close the case; there was around 0.5mm of 'play and this was sufficient to activate the tamper switch. I bodged some new 'tabs' on the top and bottom, fitted locking pins at the top. At the bottom, I reinforced the screw tab with epoxy and redrilled. Also, stretched the tamper spring a bit. The pureists will shoot me down, but the result was it now all works, no Tamper Fault Lockout message and did not have to buy a new keypad.

Knew it! Purists. Not saying it is the most elegant solution, but this RKP is in the garage so am not overly concerned with the appearance. I could certainly have done a better job with taps and dies, etc, but don't have access to those tools. Yes, it is not the most expensive alarm but what does one get for more money? Ass an alarm, it works, it activates the sounder when triggered; what more do I want? The electronics are fine, they do what they say on the box so why should anyone have to spend £25 just to get a new case? And only because the case is poorly designed. The control box plastic case is much better designed with the plastic tabs being stronger. But I do agree that fixing the issue may not be everyone's cuppa. It is mine; I installed the system and set it up when I built the house