Drew Callahan · May 3, 2026
I’ve got my Crossroads Redwood sitting in a pull-through right now, and I’m looking at the furnace access panel I pulled off the sidewall about an hour ago. Inside that compartment lives two components that almost nobody thinks about until they fail: an igniter and a control board. Those two parts work in tandem, and … Read more
Drew Callahan · May 2, 2026
I’ve got a Riverstone control board sitting on my workbench right now — scorched at one corner, the solder joints cracked and discolored where the heating relay used to fire. That blackening tells you everything: a furnace that kept trying to ignite, kept failing, and left the board to absorb the electrical punishment until it … Read more
Drew Callahan · May 2, 2026
“Drew, my Cougar’s furnace won’t light at all. I’ve got heat in the morning or it shuts off mid-cycle. Dealer wants $1,400 to even look at it. Am I looking at a full furnace swap, or is this something I can actually fix?” That message came through on a Tuesday afternoon from a guy in … Read more
Drew Callahan · April 27, 2026
Most RV owners think a diesel heater either works or doesn’t — that it’s binary, like flipping a light switch. They assume if heat isn’t flowing, the whole system is shot and needs a dealer visit. That assumption costs money and time. The truth is messier and more useful: your Thor Tranquility’s heating failure is … Read more
Drew Callahan · April 27, 2026
I had my Solis sitting in the service bay one afternoon, pulling the mattress platform to access the combustion chamber, when I realized how many owners never dig into this one—and how many times it bites them when the weather turns. The diesel heater on a Winnebago Solis is a genuine asset for shoulder-season travel, … Read more
Drew Callahan · April 26, 2026
Skip this repair and your Airstream Interstate 19X becomes a rolling ice box the moment temperatures drop — and you won’t realize how urgent it is until you’re already parked for the night with no backup heat. The diesel heater’s glow plug and fuel pump fail quietly at first: a hesitant spark, a faint clicking … Read more
Drew Callahan · April 26, 2026
I’ve got a glow plug sitting on my bench right now—pulled it from a 2022 Revel 44E last month—and you can see exactly where the problem lives: the ceramic tip is cracked, the electrical contact is corroded to a dull bronze, and the threads show the ghost marks of a fuel-fouled chamber. It’s physical proof … Read more
Drew Callahan · April 26, 2026
“Drew, my Unity’s diesel heater won’t fire up anymore. I hear the pump trying, but there’s no ignition—just dead silence after a few seconds. Am I looking at a glow plug, or could it be something else?” That was Marcus, texting from somewhere in Oregon, and it’s the exact scenario that separates a warm night … Read more
Drew Callahan · April 24, 2026
Your diesel heater won’t fire up on a January morning, the glow plug cycles but nothing ignites, and you’re staring at a fault code that your owner’s manual doesn’t explain—so what now? If you’re running a Webasto or Espar unit, you’re not alone in this breakdown, and the good news is that most of what … Read more
Drew Callahan · March 20, 2026
I’ve got a blackened igniter electrode sitting on my workbench right now — pulled from a Berkshire that came in last month with the owner convinced the whole furnace assembly was toast. The ceramic around the spark point is cracked, the tip’s carboned over to nearly nothing, and the wire connector shows green corrosion where … Read more
