We Fix What Others Won’t
When control systems fail, you need more than a vendor—you need a team that can diagnose the problem quickly and fix it right. Mercer Controls provides comprehensive repair and replacement services for water and wastewater control systems across South and Central Texas. We troubleshoot, repair, and replace failed components to get your system back online as quickly and safely as possible.
Unlike many integrators, we are not limited to servicing our own equipment. Mercer Controls will work on any control panel, any control system, and any manufacturer’s equipment. If it powers or controls your system, we can fix it.
Comprehensive Troubleshooting & Repair
Our technicians are experienced in diagnosing both electrical and controls-related failures. We take a practical, methodical approach—identifying the root cause of the issue, stabilizing operations, and restoring full functionality.
We routinely repair and replace:
- Failed electrical components (contactors, breakers, relays, starters)
- PLCs, I/O modules, and control wiring
- Variable Frequency Drives (VFDs) and motor controls
- Sensors, level devices, and instrumentation
- Power and control circuits inside panels
- Motors and motor wiring
- Pump control issues and sequencing problems
Whether the failure is mechanical, electrical, or controls-related, we have the experience to resolve it.
Servicing Any Panel.
Any System.
Any Manufacturer.
Many service providers will only support systems they installed themselves. Mercer Controls is different.
We regularly service:
- Panels installed by other integrators
- Older legacy control systems with band-aid repairs
- Mixed-vendor panels and equipment
- Systems with poor documentation or unclear “rats nest” wiring
If something was installed incorrectly, we will correct it. If motor rotation is wrong, we will rewire and verify it. If a system is unreliable or unsafe, we will make it right.
Our goal is not to assign blame—it is to restore reliable operation.
Repairs That Improve Reliability
In many cases, repairs are also an opportunity to improve long-term performance. When appropriate, we recommend practical upgrades that reduce future failures, improve safety, and make systems easier to operate and maintain.
This may include:
- Replacing obsolete or failure-prone components
- Improving panel layout and wiring organization
- Adding protection for motors and drives
- Improving labeling and documentation for operators
We focus on solutions that make your system more dependable—not just temporary fixes.
Trusted Support for Critical Systems
Cities and utilities rely on Mercer Controls because we are willing to step in when others won’t. We take ownership of the problem, work through it with your operators, and ensure systems are running safely and reliably before we leave.
If a panel, pump, drive, or control system isn’t working the way it should, we’re ready to help.
📞 (361) 782-7168