We have an Elk M1 Gold wIth 4-wire GE smokes (541NCSXT) throughout the house and a heat detector in the kitchen. The smokes are wired to different zones. We have had multiple false alarms over the past 4 months. Each false alarm has been from a different smoke detector. The smoke detectors have all be reset and cleaned, but we continue to have false alarms. Our system has been serviced after each false alarm, but no cause has been found. The fire department is automatically called after each false, so we are anxious to get this fixed. Any suggestions are appreciated. Please help. Thank you.