HVAC Question
 

Hi All,
New here...And also new to Cadillac. We just purchased a 2005 Escalade with 80k miles. It has the dual zone automatic climate control heating/cooling system. On the ride home from picking it up the blower was stuck on low speed only. Did some research on this site and others and through my diagnostics determined it was the blower control module. So I replaced the module with a new OEM A/C Delco unit. Worked great for a week or so. Now today it is working erratically. Sometimes will blow on all settings and other times only low....Anyone ever had trouble with something like this. I tested the new module after install and all of the voltage outputs were correct. I also tested the control itself and all appears to be working correctly. I guess the control would be the next step in the chain....Help!!
Thanks,
Seth