Onan EC-30 auto start issues...won't start for HVAC CALL
I have two duo therm AC units and LP furnace using a Duotherm comfort center thermostat in my 2008 NRV Pacifica 40e that work perfectly on Shore and Gen power in Manual mode. I have an OEM installed Onan QD8000 with an EC-30 command center.
When I set the EC30 to Auto mode the generator should start to support HVAC (temp is 75 degrees, thermostat set to 60 degrees to test). but generator doesn't start.
Troubleshooting thus far...
I ran the diagnostics test on the EC-30. Safety test passes, start test passes but HVAC test fails.
I verified that their is a wire properly plugged into the wiring harness designated HVAC1.
I do not know how to check that wire to see if it is sending a message from the Duotherm comfort center to the EC-30
Onan tech service at Onan distributor and local RV shop says that replacing the EC-30 is likely the quickest fix? (Approx $300).
While my coach is an '08 model, it only has about 21k miles on it.
Anyone else have this problem? Or have an EC-30 console go bad?
Any other suggestions?
2008 Pacifica PC40E
Caddy SRX toad w/Blue Ox/Patriot tow setup
360 hp Cummings/Freightliner