Air conditioner change

[Roadglide117]

I'm helping my brother put in a new AC unit on his DS...has anyone installed a conversion kit? I'm not quite understanding what this does. Not like he's going from 1 manufacturer to another. I haven't found any instructions on line. He had a Dometic and replacing with another, just going from 13 to 15 size unit.

 

[Nicholas C]

I'm helping my brother put in a new AC unit on his DS...has anyone installed a conversion kit? I'm not quite understanding what this does. Not like he's going from 1 manufacturer to another. I haven't found any instructions on line. He had a Dometic and replacing with another, just going from 13 to 15 size unit.

I'm helping my brother put in a new AC unit on his DS...has anyone installed a conversion kit? I'm not quite understanding what this does. Not like he's going from 1 manufacturer to another. I haven't found any instructions on line. He had a Dometic and replacing with another, just going from 13 to 15 size unit.

 

[Nicholas C]

Did the same. What is happening is the older coaches are not digital but analog. So the thermostat and the unit cannot communicate. You need a conversion board you can get them online and the directions are self explanatory it’s a matter of cutting and connecting wires to the circuit board. Make sure you follow the order or it will not work.

 

[Roadglide117]

Thanks, exactly what i did. New AC unit board controlled 10-12 button thermostats and his is a 5. Wired up, AC & heat pump working fine. He ordered a soft start as well. The dealer sold him the AC unit and soft start and the soft start is the wrong one.