This applies to your car, pets, HVAC units and appliance. Yes, spending $80 to have someone check out and clean your furnace and AC once a year sucks. But it sucks more to have to pay $220 to pay a plumber to come out and snake the condensation lines in your AC unit because it was clogged. Oh, and to clean up the aftermath of that flooding and wash three loads of towels used to mop it all up. Ah, homeownership.
In other terms, Napoleon’s heartworm meds cost $30 for a year. His flea and tick meds are more expensive at roughly $10 a month. If he were to contract heartworm, it would cost me more than $800 to treat it.
So change your air filter, clean your drains and change your oil.
You should also do routine maintenance on your oven, dishwasher, fridge and washer/dryer. Check out your manual or google the appliance for more info. You have to clean the seals on everything, clean out any traps, etc. You’ll be glad you did.