Dependable Garage Door Service had someone show up within hours of my call. I was told my unit would be costly to fix and it was recommended that I replace with Liftmaster 3255. Installer gave me price and left for 20 minutes to get rail. After installation, I gave installer 10 Internet coupon that I printed out. Installer said the price was already discounted and he couldn't accept coupon. I hadn't mentioned coupon previously. Why have a coupon on website if it is useless? Installer also gave incorrect instructions for programming HomeLink in car.
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