Does anyone have suggestions on getting warranty service on a 70 pt whole house dehumidifier?  Alternatively, if I just replace the thing, what brand actually lasts and has a mfg that stands behind their warranty?

Mine is branded “Clean Comfort” and the associated paperwork identifies that as a Daiken company.  Other paperwork packaged with the unit indicate it is a Thermastor product. After 10 months in the house, the unit freezes up and won’t dehumidify.  Attempting to get service via the following paths:
1. Installing contractor: only does new installs for builders.  Contact mfg for warranty svs. Dead end.
2. Builder is a dead end.
3. Go online to http://www.thermastor.com/registration which is the web page on one piece of paperwork that comes with the unit.  It won’t let me continue unless I select the brand, but only offers Phoenix, Quest and Santa Fe as the options.  Mine is none of those, so I can’t continue.
4. Call the “Daikin North America” 855 number in the manual, which states “In order to make a warranty claim, the Customer should call Daikin Consumer Affairs at 1-855-239-2665, which will then arrange for Product or Component repair or replacement.”  That number leads to Thermastor which states the serial number indicates it is a Goodman product, so warranty is for parts only (NOTHING in my paperwork mentions Goodman).  They cannot explain why my paperwork states they will arrange for repair or replacement, and they won’t do anything but keep repeating to call a service co.
5. Go to the Clean Comfort website and call the consumer affairs number, which identifies itself as Goodman.  After several calls, during about half of which I get put on hold and hung up on, I get the names of two different service companies.  I’ve called both.  One claims they don’t work on these units and people keep calling them after getting their name from Goodman and they don’t know why.  The other claims they don’t repair these unit; they replace them with AprilAir (Thermador competitor) units at approx. 2.5 times the cost of an actual replacement unit online.  No thanks.

Independently I’ve also called both HVAC and appliance repair co’s, both of which state they don’t work on these.  I’ve gotten through to a Thermador tech rep who states they would send free parts but not pay for labor (that is NOT what the printed warranty states).

At this point I just need to get dehumidification.  I’d like to replace it with one of similar size so I don’t need to revise the vibro isolation and/or ducting. Unless someone has any other ideas, I’m going to have to buy a whole new unit.

Which brands actually last and/or have mfg that stand behind the product without leaving the end user/homeowner stranded?