2025 Tiffin Phaeton TSBs

2026 Allegro RED 360; 2025 and 2026 Byway; 2025 and 2026 Phaeton; 2025 and 2026 Zephyr Motorhomes that are equipped with PTL entry doors with a TriMark entry lock, owners may experience a lock out situation. TriMark has notified Tiffin Motorhomes that there is a possible condition where the exterior entrance door handle mechanism can bypass the inside linkage causing a lock-out situation whereby the door cannot be opened from the exterior handle. TriMark is replacing all involved entry door inside handle assemblies with new inside handle assembles. PTL Engineering states these locks are installed in entry doors with a serial number #068849 through #072552.

units be refueled using standard automotive-grade diesel fuel pumps, rather than high-flow commercial truck stop pumps. The fuel delivery rate from commercial truck stop pumps is often too aggressive for motorhome fuel systems, which are not designed to handle rapid fuel intake. Using high-flow commercial truck stop pumps can result in overflow, spillage, premature shutoff, or even damage to the fuel fill components."

Starlink System in their Tiffin Motorhome. And after reviewing the information, to add it to their Owner's Manual for future reference.

solar panel solar panels systems, the 30A inline fuse located before the cable entry plate should be removed. The plastic housing surrounding the fuse may become heat damaged from heat generated by the normal operation of the 30A fuse, which would cause the solar panel system to not operate as designed. Due to updated recommendations from Go Power!, Tiffin Motorhomes is removing this 30A fuse from the solar panel system.

Replaced with these, but these new lights have to be wired in instead of just clicking in. These are the instructions to wire in.

NHTSA #24C-392 and #24V-393 on certain 2025 model year vehicles. The affected vehicles may be missing the snap ring on the preset hubs and/or have unbent retainer tabs on the conventional 4-piece fastener hubs. This could allow the wheel hub fasteners to loosen. Wheel separation may occur resulting in an increased risk of loss of vehicle control and a crash.