Only Hot Water Coming Out Of Sink

Only Hot Water Coming Out of Your Sink? Here's How to Fix It

Meta Description: Frustrated with only hot water coming from your sink? This comprehensive guide diagnoses the problem, from simple fixes like checking your faucet handles to more complex issues like a faulty cartridge. Learn how to troubleshoot and potentially resolve this common plumbing problem yourself.

Getting only hot water from your kitchen or bathroom sink is a frustrating plumbing issue, but often one with a simple solution. Before you call a plumber, let's troubleshoot this problem together. This guide covers common causes and how to fix them, from basic adjustments to more involved repairs.

Understanding Your Faucet

Before diving into solutions, it's crucial to understand your faucet type. Most sinks use either a single-handle or two-handle faucet. Single-handle faucets mix hot and cold water internally, while two-handle faucets rely on separate hot and cold water supplies. This distinction significantly impacts the troubleshooting process.

Simple Solutions: Quick Checks and Adjustments

Before assuming a major plumbing problem, let's start with some easy checks:

• Check your faucet handles: Is the hot water handle fully engaged? Sometimes, a slightly misaligned handle can restrict cold water flow. Try fully turning the hot water handle off and then carefully turning on the cold water handle.
• Look for debris: Inspect the faucet aerator (the mesh screen at the end of the spout) for clogs. Remove it carefully, clean it with a brush, and replace it. Mineral buildup can restrict water flow, affecting the mix.
• Inspect the faucet hoses: Check the flexible hoses connecting the faucet to the shut-off valves under the sink. Look for kinks, cracks, or damage that might restrict cold water flow. If damaged, consider replacing them.
• Check the shut-off valves: Underneath the sink, locate the shut-off valves for both hot and cold water. Ensure that the cold water valve is fully open. Sometimes, these valves can become partially closed due to mineral deposits or age.

More Complex Issues: Deeper Diagnosis and Repairs

If the simple solutions don't work, the problem is likely more complex. Here are some potential issues requiring more advanced troubleshooting:

• Faulty mixing valve (single-handle faucets): The mixing valve inside a single-handle faucet controls the water temperature. A malfunctioning valve might always deliver hot water. Replacing the cartridge inside this valve is often the solution but may require some plumbing knowledge or professional assistance.
• Broken or damaged cartridge (single-handle faucets): The cartridge is the heart of the single-handle faucet. Wear and tear, mineral deposits, or damage can cause it to malfunction, leading to only hot water coming out. Replacing this part often requires specialized tools and some plumbing expertise.
• Clogged water lines: While less common, mineral buildup or debris can sometimes clog the water supply lines leading to the faucet, restricting cold water flow. This often requires specialized tools and skills to clean or replace the affected sections of pipework.
• Frozen pipes (in colder climates): If you're experiencing this problem during cold weather, frozen pipes could be restricting the cold-water supply. Allow the pipes to thaw naturally or use a hairdryer carefully to defrost them. Never use an open flame.

When to Call a Plumber

If you've tried the above solutions and are still experiencing only hot water from your sink, it's best to contact a qualified plumber. They have the tools, expertise, and experience to diagnose and fix more complex plumbing issues effectively and safely. Attempting complex repairs without the proper knowledge can potentially lead to further damage or even injury.

This guide provides a starting point for troubleshooting your hot-water-only sink problem. Remember safety first, and don't hesitate to call a professional plumber if you are unsure about any repair. Remember to always turn off the water supply before attempting any repairs under the sink.