Hey Steve. This is taking me back aways, but I seem to remember these buttons getting stuck by food and dried beverage syrups (sweetened coffee, Coke) getting in between and behind them. So remove the panel and give it a good cleaning and drying to start.
I had the same problem and for me it was easy fix there is a vacuum line that runs into then out of a vacuum canister then through firewall which changes the settings. It is top of firewall in the open by air intake for blower motor and towards engine from windshield wipers
Search Subaru Loyale Questions
Subaru Loyale Experts
Related Models For Sale
Used Cars For Sale