Do not get caught up with what the thermostat reads. You should always balance the system based on the liquid temperature. If you are experiencing frozen beer or water, the system is probably set too cold. Continue to adjust until you can acquire 38 F. At your elevation and temp. at 38 F, Coors Light should be slightly higher than 17 PSIG. As to a forcing cold air into the tower, check this link on
blower and flex tube.
Scott Zuhse, Instructor
Micro Matic Dispense Institute