Sediment builds up at the bottom of the tank over years of use. As it hardens, water trapped underneath it boils and pops, creating a rumbling or knocking sound during heating cycles. This makes the unit work harder and shortens its remaining lifespan.
Rust-colored hot water, especially if cold water runs clear, often points to internal tank corrosion. Once the tank itself starts rusting from the inside, a leak is usually a matter of time rather than a question of if.
Even a small amount of moisture pooling near the unit is worth investigating immediately — it can mean a failing pressure relief valve, a loose fitting, or in worse cases, a hairline crack in the tank itself.
Water that runs hot, then lukewarm, then hot again during a single shower usually points to a failing heating element or thermostat rather than the tank itself, and is often the more affordable of these five issues to repair.
Age alone doesn't guarantee failure, but most standard tank water heaters are designed for a 10 to 12 year service life. Combined with any of the signs above, an aging unit is worth having inspected before it fails during a New England cold snap.
Rumbling sounds and rust-colored hot water are the two earliest warning signs — both are worth a same-week inspection rather than waiting for a full failure.
If the checks above don't resolve it, here's exactly what happens when you call us for this issue.
Call (508) 464-9173 and describe exactly what you're seeing — the more detail you give, the faster we can bring the right parts on the first visit.
A technician inspects the appliance in person and confirms the actual cause, rather than guessing from symptoms alone, using the same checks covered in this guide plus manufacturer-specific testing.
You approve a clear, upfront price before anything is repaired or replaced — no surprise charges once the job is underway.
The appliance is tested to confirm the issue is fully resolved, and every repair is backed by a 90-day warranty on parts and labor.
What Taunton homeowners usually ask about this exact issue.
Still not sure what's causing the problem? A five-minute call is often faster than troubleshooting alone.
Other troubleshooting guides Taunton homeowners read alongside this one.
Articles are a great starting point, but same-day appliance repair in Taunton is one call away.
