ICM Controls ICM253 Fan Delay Timer - Adjustable Off Delay 12-390 Seconds for HVAC, Bathroom Exhaust & Attic Fans | Perfect for Home & Commercial Ventilation Systems

Works as intended--the fan still runs ON SELECTED TIME after the condenser turned off from outside.I set mine to about 2 minutes after the thermostat cuts off the A/C.Installation:Like the diagram on the ICM253 unit.--1 and 4--bypass (undo and reconnect) the current GREEN wire from the Fan (1) and the GREEN wire from the thermostat (4)--2 and 3--tap (add into existing) into the 24vac from the RED (2) and BLUE/common/neutral (3) wiresI did not see the BLUE/COMMON/NEUTRAL 24vac wire once the furnace was opened.The wire diagram makes no sense at all !!!Google and YouTube did not help.So I removed the two screws and take out the cover that protected/covered the wirings and the 24v transformer (besides the breakers).I look for the 24v transformer and its Common/Neutral wire---It has wires out for the 24vac and wires in from the 240vac (labeled on the transformer...see picture).I saw the 24vac Common/Neutral wire (gray colored on this wire).I also saw that it was connected to the condenser outside...I simply tapped into that gray colored wire and done.Hope it helps someone out a bit.Have a great day.