Condensing units require some homeowner maintenance such as keeping vegetation off sides, cleaning fins periodically, and ensuring the unit is placed on a solid level pad. Sometimes though you need to take extra steps to protect the unit from pets.
This photo shows a unit with excessive damage probably the result of a dog using it as a urinal. Another possibility is spray fertilizer. I've seen chicken wire placed around these units to keep pets away which is alright with me.
Typically a well maintained unit will last between 10-15 years but I've seen them much older in good working condition. My unit was manufactured in 1985 and still works like a champ.
Here are a few tips for homeower type maintenance.
* Keep a 2' clearance around the sides. Vegetation and structures close to the sides can reduce the efficiency.
* Clean the fins periodically. I prefer to use a soft horsehair brush attachment on my vacuum. That way I don't damage the fins and it does a great job of getting debris off. Commercial coil cleaners are available.
* Maintain a clearance at the bottom. The unit should be seated on a pad that is visible. Mulch and soul shouldn't be in contact with the lower fins or cabinet.
* If you have trees on your property place a cover on the top to keep leaves and twigs out during the fall/winter months. I'm not a big fan of full covers.
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