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Are you talking about a Level Legs module? IF not, please explain.
Sorry for the delay in getting back to you........I was out of town all day and just got home. What is the make and model of the thermostat you have now? Do you know for sure that it is bad?
For some reason, it never got posted.......I had asked you the make and model of your thermostat.
These are very sensitive to voltage flucuations and those are usually caused by batteries that are failing or a bad converter. I would take care of the battery issue first.........have them load tested and clean all the cables and especially the ground lead to the chassis. A bad ground is just as troublesome as bad voltage. Then we can address the control. I will need to go and see if I have a manual on that still........I haven't seen one if a while.
Surface voltage doesn't tell you much.......I understood from what you told me that they weren't holding a charge No?
The best replacement for this is going to be a Dometic Single Zone thermostat kit. The part number would be dependent on which model A/C you have...........standard or heat pump version or one with a heat strip. Let me know which one you have and I can give you the correct number.