[kaptain]

Today is my first time turning on Aqua-Hot to check and see if the heating system operates normally, since my purchase of coach 701 several months ago
I see the temperate gauge start to rise, but the display appears to be having a problem - not all digits are displayed fully. See the photo attached. The "6" at the last position is missing the "_" at the bottom, and the 6 in the second place is missing a "|". 
Reading this thread, I learned the replacement part I need is M9113R, which comes with a sensor (sending unit). I see M9113 is available with other color options available too, white (M9113W), green (M9113G), and blue (M9113B) if someone wants a different color. And I found several sources to buy it
https://www.quadratec.com/p/intellitroni...e/in-white
https://www.amazon.com/Intellitronx-M911...B072N8PMXD
https://www.napaonline.com/accessories/i...s/1eaf39a9
https://www.ebay.com/itm/292299385445


   
   
Now, my questions are:
1) do I have to replace the sensor when I replace the digital display? Or can I use the existing sensor and wire with a new display?
2) If the sensor (sending unit) needs to be replaced together with the display, does anyone know the size of the bushing typically used on a Newell coach? I ask this because I see the item listed on eBay, the seller described the sensor bushing sizes are available in 2 different sizes:  "Sending unit (S8013) included (Please send a note to seller if you need a 3/8" bushing because we send the more common 1/2" bushing--otherwise, you will have to supply the bushing on your own);"