Professional Appliance Repair | Houston on Instagram: "Top 5 Common Coffee Machine Failures A coffee machine is a small but complex appliance — and sooner or later, certain parts wear out. Here are the 5 most common issues we see: 1️⃣ Scale buildup — Hard water blocks internal lines and damages the pump. 2️⃣ Worn-out gaskets — Causes leaks around the brew unit. 3️⃣ Dirty brew group — Leads to bitter taste and uneven brewing. 4️⃣ Faulty thermoblock/heater — Machine won’t heat or heats inconsisten