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Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.
Which thermostat do you have? Make and version please.
There are 4 digital models from Dometic. If you aren't sure which one you have you can attach a photo of it using the paperclip icon.
Just following up here on your question. I am wondering if you perhaps missed my earlier response or did you get this resolved? Easy to do with the large amount of e-mail most of us get these days! If you need me to resend it, please let me know. Thanks!
That is the number for a Comfort Control II thermostat and an E-5 error is for the freeze control. We can check that if you have a small digital multimeter. About $20 or so at most hardware stores and easy to use. In the meantime, try unplugging it in the control box and plug it back in again. Twin leads with a blue plug. Then try a reset and see if this clears. If you need the Owner's Manual for this please let me know and I can provide a link to one. I will be around all week-end if you want to keep after this for a solution. Thanks for getting back to me!