Nascar Farmer, Talked to Honeywell this morning and found out some info. 590-53CU05-153 is the Honeywell part n. P_N 87300499 is the CNH part n. Honeywell wouldn't sell direct but referred me to a industrial distributor in my area. They wanted me to set up an account first, which seemed like a hassle. So I called my usual CaseIH part man, and gave him the part number. He had one, but didn't know anything about it being for a hotter climate. I'm going to go ahead and get it and see if it solves my problem since it worked for you. Thanks for the information. Keith