Thanks dougrainer for the advice!
The last time I used the trailer was in August. It wasn't hooked up to shore power and had battery disconnected since. I was prepping the trailer for a trip last weekend and noticed the blank screen on the thermostat. When I switched on the fan manually it worked so I assume there's
12V power supply to the thermostat. Anyway, I will try poking around with a voltmeter to see if I can get anywhere. Disclaimer: I'm no expert in electronics.
When I bought my last Tsat on Amazon.com, it was pre-pandemic and we shopped cross-border and it costed me $50 USD. Exchange rate was quite favorable to CAD then. Since the pandemic shut down, most of the mail collection services on US side has gone out of business. The latest asking price on Amazon.ca (Canadian site) was $285 CAD. With sale taxes and possible import duties and/or brokerage fee added, it could cost a lot more.
