5 FlashesHoneywell
Honeywell 5 Flashes Error Code
Vent damper fault
Get instant help with Honeywell 5 Flashes
Stop searching through PDFs. Our AI assistant on WhatsApp is trained on official Honeywell documentation and can diagnose this fault code and guide you through the repair in minutes.
5-day free trial — no credit card required.
Other Honeywell Error Codes
164
Heat pump issue - requires technician
168
Wi-Fi radio faulty
173
Temperature sensor error
177
Indoor temperature sensor faulty
178
Outdoor temperature sensor faulty
E01
Wi-Fi setup error - router not found
E02
Invalid Wi-Fi password
E42
IP address issue (router DHCP problem)
E99
General error - disconnect and reconnect
2 Flashes
Pilot flame not detected - 5 min retry delay
3 Flashes
Flame failed during a run cycle
4 Flashes
Flame sensed with no call for pilot