Duo Therm comfort Control - keys intermittent
I have a 98 Golden Falcon with a single AC and furnace. The buttons on the Duo Therm Controller don't always respond when pressed. When I want to change "mode" and/or "fan" I have to keep pressing and they will suddenly respond, often going beyond the setting I want so I have to keep fiddling with them until I reach the desired setting. It's like the contacts for the switches are dirty, or possibly defective. The "Up" and "Down" keys work fine.
Has anyone experienced this? Can the control be taken apart and cleaned, or is it just time to replace? I have had trouble finding the four button control. All the ones online seem to be the five button version.
Any ideas? Thanks.