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Clean, Maintain Heating and Cooling SystemPlan to do cooling and heating system maintenance four times a year -- twice each winter and twice each summer. Keep this checklist handy for your routine maintenance: * Inspect belts and blowers. Change worn-out belts. Oil blower bearings. * Clean or replace filters. Some filters need to be cleaned monthly. Check your owner's manual for guidance. * Clean and clear drains, traps and drip pans. * Clean outdoor and indoor coils.
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