I had two of the portable units fail due to water intrusion. Neither showed an error (other than telling me the power was bad). Progressive replaced both. All it cost me was the postage to get the failed units to North Carolina.
Stew and Diane (and Marco)
2018 Entegra Cornerstone 45X
Formerly: 2015 Entegra Cornerstone 45B, 2013 Entegra Aspire DEQ IFS, 2004 DSDP; all sold