i would suggest that you have quite and old operator. there are two possible causes for the self operation of an electric g door. 1 old radio freq. the type with manual dip switches inside both the remote control and the receiver box on the uinit itself. (normally a bank of between 10-12 small switches) these are used for setting the codes for your operator. sometimes on older units the acceptance of passive freq. can occur ie. low flying aircraft (specifically military) as these older radio freq. had to be passive.
2. An ajacent or close by neighbour may have the same unit and indeed same code as you. this used to occur alot back in the day..when fitters didnt bother to set up an individual code and simply selected 123 eg. on the bank of switches. thus when someone with the same code opened thier door, yours would operate also (this is quite rare though).. modern operators are now digitally coded and have rolling codes built it for safety purposes. my advice would be either to change the receiver and remote controls, or to simply replace the unit. A new receiver and 2 remotes plus an engineers call will cost you around £260+vat... where as a new unit will cost more, it will be an up to date unit!!
danny
September 2008
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