Aerator/blower failure — symptoms, lifespan, and replacement cost in Texas.

Symptoms are usually obvious once you know them: the alarm, a quiet unit when it should be running, and effluent that starts to smell septic rather than earthy.

The rule to understand is like-for-like. You replace what failed with something matching the approved design. Where that is still available, it is a straightforward swap. Sometimes rebuilding the existing unit is cheaper than replacing it, and that is worth pricing before you commit.

Where it gets more involved is when the original unit is no longer made. Then it becomes a conversation with the county: can you substitute something equivalent, or does the change require a design revision? Often a similar unit is accepted. Not always.

Cost runs roughly $200 to $2,000, and the spread is not vague — it tracks what the job actually is. Parts alone typically land in the $200 to $600 range. If the work involves significant digging or a more involved unit type, it climbs toward $1,500 or more. Get the quote against your specific system, not against a number from the internet.

Reviewed August 2026. Links go to the sources this answer was checked against.