Can I Solve a Hot Water Problem by Raising the Set Temperature?

When tenants or homeowners experience inconsistent or insufficient hot water, one common assumption is that simply increasing the temperature setting on the water heater will resolve the issue.

While this may seem like a quick fix, it is not an effective solution for distribution-related problems and can even create new risks.

Understanding Hot Water Distribution Issues

Hot water problems often stem from issues within the plumbing system rather than the water heater itself. If hot water isn’t reaching fixtures adequately, the cause is likely related to one or more of the following factors:

Circulation Pump Failure in Recirculating Systems

Many multi-family buildings and large homes rely on recirculating hot water systems to ensure that hot water is readily available at all fixtures. If the circulation pump fails, hot water may take much longer to reach faucets or may not circulate properly, leading to complaints of insufficient or inconsistent hot water.

Blocked or Undersized Pipes Restricting Flow

Over time, mineral deposits and corrosion can build up inside pipes, reducing the diameter and restricting water flow. Additionally, if the original plumbing system was not designed to handle the demand, undersized pipes can cause pressure drops and slow delivery of hot water, making it seem like there isn’t enough.

Malfunctioning Mixing Valves

Mixing valves regulate water temperature by blending hot and cold water to prevent scalding. If these valves fail or are improperly set, they may deliver water that is too cool, even if the heater is functioning correctly. A faulty mixing valve could also cause temperature fluctuations, leading to inconsistent hot water at different fixtures.

Sediment Buildup in the Tank

Sediment accumulation is a common issue in storage water heaters, particularly in areas with hard water. Over time, minerals settle at the bottom of the tank, reducing heating efficiency and decreasing available hot water capacity. This can result in water running out quickly or taking longer to reheat.

The Risks of Raising the Temperature Setting

While it might be tempting to increase the water heater’s temperature in an attempt to compensate for these issues, doing so can lead to serious risks and increased costs:

• Scalding Hazard: Water temperatures above 120°F (49°C) can cause burns in seconds, especially for young children and elderly tenants. The risk increases significantly at temperatures above 140°F (60°C).
• Higher Energy Consumption: Heating water to a higher temperature requires more energy, leading to increased utility bills without actually fixing the root cause of the issue.
• Potential System Damage: Overheating the water can put unnecessary strain on the water heater, potentially shortening its lifespan and leading to premature equipment failure.

The Right Solution: Professional Inspection and Maintenance

Instead of adjusting the temperature setting, the best course of action is to identify and address the underlying cause of the hot water problem. A professional plumber can:

• Test circulation pumps and replace them if needed
• Inspect and clean or replace clogged pipes
• Check and adjust mixing valves
• Flush the water heater to remove sediment buildup

By diagnosing and resolving the true source of the problem, property owners and managers can ensure consistent, efficient, and safe hot water delivery to tenants.

If you’re experiencing hot water issues in your building, contact the pros at DRF Water Heating Solutions today to schedule an inspection and avoid the risks of ineffective DIY solutions.