Drew Callahan · April 15, 2026
Most Thor Gemini owners assume their air conditioner is either working or broken—that there’s no middle ground, no partial failure, nothing to diagnose or fix yourself. That assumption costs them money and discomfort. The reality is that AC units fail in stages, and catching those early warning signs—the compressor that hums but doesn’t spin, the … Read more
Drew Callahan · April 14, 2026
I’ve got my workbench set up in the bay right now with a Thor Gemini furnace assembly pulled from a 2018 model — the owner called it in after three failed ignition attempts in a row, each time the blower spinning up, the igniter cycling hot, then nothing but dead silence and a lockout code. … Read more
Drew Callahan · January 13, 2026
Slide-Out Motor Replacement for THOR GEMINI You’ll hear two very different pieces of advice about THOR GEMINI slide-out motor work: dealer service departments almost always quote you $800–$1,200 and insist you need their lift bays and diagnostic equipment to do it safely. Meanwhile, RV forums and YouTube channels make it look trivial — just swap … Read more
Drew Callahan · January 13, 2026
Water Pump Replacement for THOR GEMINI A Thor Gemini water pump failure will cost you $800 to $1,200 in dealer labor alone — if you can get an appointment before your trip leaves in three weeks. That’s the math that changed my mind about doing this work myself. The water pump on the Thor Gemini … Read more
Drew Callahan · January 12, 2026
Roof Leak Repair and Resealing for THOR GEMINI Most Thor Gemini owners don’t realize their roof leak started years before water ever dripped onto their interior ceiling. By the time you spot a stain on the overhead cabinet or smell mold creeping in, the sealant has already failed, the substrate is already compromised, and you’re … Read more
