Trane White Rodgers 50A65-475 CNT03076 Furnace Fan Control Board*REPAIRED* The fan relay had opened around the solder pad causing the blower to not run. I reestablished the connection and tested the board for proper operation. This is a 100% fully functional control board! This is an expensive board so save some money on this one! Free Shipping! CCAC Employee Web Documents Contact your local Trane Comfort Specialist™ if you’re unsure. Why is it hot upstairs and cold downstairs? ANSWER: Heat is escaping. Create climate zones to heat the rooms you want. The DIY way to do this is to close a few (not all) vents on the second floor. This forces your heating system to direct more air downstairs.