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How to Fix Suburban SF-42 Furnace Rumble and Backfire Issues
Propane Medium 2-3 hours 76 👍

How to Fix Suburban SF-42 Furnace Rumble and Backfire Issues

I looked everywhere online for answers but as a first-time RV owner, I'm completely lost why my 2003 Alpine coach's Suburban SF-42 furnace keeps rumbling and backfiring nonstop! This thing fires up fine initially, but then it starts making these awful rumbling sounds and actually backfires through the intake - scared the hell out of me the first time it happened. The worst part is it's not heating worth a damn even though it runs constantly.

I've already cleaned what I could reach and checked for obvious blockages, but I'm wondering if this could be an air-fuel mixture issue? The unit is over 20 years old now, so I'm prepared for the possibility that major components might need replacing. Could this be related to gas pressure problems, or maybe the igniter is going bad and causing delayed ignition? I really need to understand what's actually causing these rumbling and backfire symptoms so I know what to focus on next. …more
Aqua Hot Engine Coolant Hose Failure: Emergency Roadside Repair Guide for RVs
Engine Hard 1-2 hours roadside 68 👍

Aqua Hot Engine Coolant Hose Failure: Emergency Roadside Repair Guide for RVs

Despite what started as a minor Aqua Hot coolant leak in my Western Alpine motorhome last month, the engine coolant hose has now completely blown out three times this week crossing Texas on I-10. Each time it happens, I lose coolant and have to find a repair shop, but the repairs don't seem to be holding up to road conditions and vibration.

The first failure happened about halfway across Texas, got it repaired at a local shop, but it blew again after only 80 miles of driving. Made it to Houston where it failed a third time, and now I'm stuck at Auto Tech Center in Kingwood, TX (owned by Wendel Walden), paying $50 a night for water and electric, plus $225/hour for labor. I'm also facing additional costs of $10 a day to store a box trailer I need to pick up on the south side of Houston.

What are my options for emergency roadside repairs when this type of Aqua Hot coolant hose failure happens? Should I be carrying specific spare parts and tools for this type of repair? Is there a way to temporarily bypass the Aqua Hot system entirely so I can at least get to a proper repair facility without risking further engine damage from coolant loss? …more
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