- Instead of changing the detector with an identical PIR, go through our ‘PIR fault finding checklist’ to prove the cause is RFI
- Swap the troublesome PIR with another in the same building
- Fit an ACT 1376 PIR stabiliser inside the troublesome zone PIR and put the circuit on a soak-test
- If a false alarm moves to the other zone, change the PIR and recover the PIR