RNS Security can diagnose and fix all types of security systems, even if we didn't install it originally. Common call-outs include camera or sensor faults, unresponsive control panels, alarms that won't disarm, and systems that are simply outdated and need upgrading to add phone app access or extra coverage. We work with all major brands including Hikvision, Paradox and Inner Range, and most call-outs are diagnosed on the same visit, with an upfront price before any repair work begins.