I've been running a Robertshaw 9600 on my heater for about 5 years now. Have had to change batteries 3 times? This isn't probably helping you much cause I have a separate stats for my AC and heater. And the 9600 is not made anymore (typical- best stat made for price and purpose- drop it???). See no problem using an aux. switch for hi and lo.
My stat change didn't work for me as I wanted. Had it programmed to turn heat on around 8PM (while out by campfire) and shut off at 9PM. Don't want any heat at night. Bloody stat had a minimum setting of 45 and would come on several times a night. So, I'm back to manual.
Shep
