Rule to disable rule - or alternative solution

Please use the code fences when posting code:

Install the expire binding

Set-up at new item:

Switch Washen_Timer { expire="10m, OFF }

Then your rules:

rule “React on Waschen (Waschen_Switch) change/update”
when
Item Waschen_Switch changed from OFF to ON
then
    // something to disable the rule above for 10 minutes
    Washen_Timer.sendCommand(ON)
end

rule “React on Leistung (Waschen_Power) change/update”
when
    Item Waschen_Power changed
then
    if (Washen_Timer.state == OFF) {
        val wpwr = Waschen_Power.state as Number
        val pwrthreshold = 4
        if (wpwr <= pwrthreshold){
            sendTelegram(“cmhomebot”,“OpenHAB Info - Wäsche ist fertig”)
            sendCommand(Waschen_Switch, OFF)
        }
    }
end

The Timer item with get update to OFF 10 minutes after receiving the command ON