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AC upgrade

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DaveBizzy

RVF Newbee
Joined
Oct 24, 2026
Messages
2
Hi All, I am new here and of course everyone joins forums once they need help LOL! We have owned our 2005 Tradition 40J since 2009 and added 100K miles to it over the years. I have decent mechanical and electrical skills and know about 90% of the mechanics and systems on my coach. We have done numerous re-fits and upgrades over the years. Hopefully some of you have done what I am getting ready to do. It's time for the dreaded AC upgrade to Mach 8's since they have heat pumps and condensation pumps. I have had the parts delivered but I'm concerned about compatibility.
Old units 9023C879
Atwood thermostat
I have hydrohot
New units Mach 8's 37024-079
New Control boxes 9630A751
New Thermostat Micro-Air EasyTouch RV 345

So here are my concerns:
1. Is there sufficient wiring in place to connect everything?
2. Is the Hydro hot controlled through the control boxes or directly from the thermostat?
3. Do I have the right components for what I'm trying to achieve?

If anyone can shed some light and has been down this road thanks in advance and I'm happy to pay it forward!
 

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