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Always Start By Checking the Obvious
It always pays to check for all the basic problems before you look for more serious problems and do your home appliance repair. And that includes checking power settings, making sure the appliance is plugged in and turned on, checking to see that the outlet is getting power, etc. Some appliances may refuse to work if they are placed on an uneven surface, or if their filters become clogged and they start to overheat. Cover these simple checks first before you dive down deeper.
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Know the 50% Rule
The 50% rule states: If the appliance is more than 50% through its expected lifespan (you can usually find life-span estimates in the manual or online). And the expected cost of repairs and replacements is more than 50% of buying a new appliance, you should probably replace the appliance entirely. This is helpful when comparing the costs of home appliance repair, professional services, DIY work and replacement.