LRKDRV7.3 Posted January 30, 2022 Report Share Posted January 30, 2022 (edited) Fulltime april thru june 2021, hot weather in may-june rear main a/c did not keep up. Mobile Service blew out filters says is fine but no change. Took to dealer in october for winter prep and replace rear a/c. Service check, old unit running at spec. New unit installed, system will not allow both units running. Dometic twice provided fabricated harness but still no resolution. ANYONE have issue replacing 1 old unit with 2 unit rv? Any known resolution? Thanks for any ideas. Edited January 30, 2022 by LRKDRV7.3 Quote Link to comment Share on other sites More sharing options...
Wrknrvr Posted January 30, 2022 Report Share Posted January 30, 2022 What does your thermostat look like. Once we know that , then we can reprogram your system. If it will not reset, then we can look farther for what is wrong. Vern Quote Link to comment Share on other sites More sharing options...
Kirk W Posted January 30, 2022 Report Share Posted January 30, 2022 Vern is probably the most experienced a/c guy that we have so I'll wait and watch to see what follows. Quote Good travelin !...............KirkFull-time 11+ years...... Now seasonal travelers.Kirk & Pam's Great RV Adventure Link to comment Share on other sites More sharing options...
TXiceman Posted January 31, 2022 Report Share Posted January 31, 2022 First thing to tell us the make and model of the A/C units and thermostat. For those of us that do not have that specific year DRV. Ken Quote Amateur radio operator, 2023 Cougar 22MLS, 2022 F150 Lariat 4x4 Off Road, Sport trim <br />Travel with 1 miniature schnauzer, 1 standard schnauzer and one African Gray parrot Link to comment Share on other sites More sharing options...
LRKDRV7.3 Posted June 5, 2022 Author Report Share Posted June 5, 2022 my photo of thermostat is too large 104 with a file size limit of 100 Dealer stuck me with "traded out" to connect bedroom unit with new living room unit They said new 6 wire system a/c would not work with 4 wire thermostat and bedroom old style 4 wire would not work with new 6 wire main unit and new thermostat Claimed dometic sent new cabling twice but nothing worked til they swapped out bedroom unit which worked fine when it went in. Over $3,000 and 4 months later i have a new living room a/c, new thermostat, and a replaced a/c in bedroom. I brought home both old a/c's & old thermostat. Old living room supposedly had heat pump......not sure new one does. Only happy i got my rv out and home. Waiting to see if all works to make wife happy. Quote Link to comment Share on other sites More sharing options...
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