Can a heater or air conditioner set the PIR off?
Yes, but rarely does this occur. Manufacturers have built-in sensitivity adjustments which may be calibrated by the technicians to eliminate that problem at the time of installation. However, if you have made a change in the area of protection, for example, added large curtains that move when the air conditioner turns on, the sensor was calibrated without these in place. A call to the DFT at 800-724-1057 (ask for Service & Repair) to schedule a service call to re-calibrate or re-locate the PIR should solve this problem.
