Fridge warming but freezer still frozen

I ordered a defrost timer and defrost thermostat from partselect.com. Parts arrived in 2 days (earlier than expected). Unplugged appliance, removed bottom cover, unscrewed 2 screws holding timer in place, unplugged timer and replaced with new part. Fastened back into place. Next removed back cover of freezer (5 screws using nut driver). Disconnected old thermostat and removed. Wires already had connectors installed. cut off the connectors with some wire left on and reconnected them to the new thermostat with the included blue wire crimps. Tried to use the shrink tube to insulate but couldn't get it snug enough. Just used electrical tape instead. Reinstalled thermostat. Reassembled cover. Plugged in and fridge and freezer are working fine again. Thanks partselect.com.