Opener operates normally but door reverses when it is very cold or very hot outside.

Safety: Do not over‑increase force; always verify door moves freely by hand.

• 1. Seasonal lubrication: Lubricate hinges, rollers, and bearings with a low‑temperature garage door lubricant.
• 2. Check weatherstripping: Replace hardened or sticky bottom seals that freeze to the floor.
• 3. Slightly adjust force: Increase Sommer force settings only enough to compensate for seasonal stiffness, then test safety reversal by obstructing the door with a 2x4 laid flat as per safety standards.
• 4. Re‑run travel learn: In extreme seasonal changes, re‑run the travel learning procedure so the opener recalibrates force.