15 Reasons Why No Water Coming Out Of Hot Side of Faucet

If you are washing the utensils, hands, or taking a shower and no water comes out of the hot side of the faucet can be a horrible situation. Lack of hot water in the house can lead to many inconveniences as it plays a major role in the day to day life.

Several reasons can lead to water not coming out of the hot side of the faucet like a rusty faucet, frozen pipes, faulty installation, and airlock pipes. It can also be a result of leaked or clogged pipes which leads to low water pressure, wrong timer setting, unwitting boiler restart, or problems with tap washers. You should not rush to call a plumber as some of the issues can be easily be fixed by checking if there is a power connection or if the water supply is suspended, if the main water valve is turned on and if every faucet is functioning or it is just one which is interfering with the faucets.

15 Reasons why No water is coming out of Hot Side of the Faucet

Rusty Faucet

Rusty faucets are normal. If the faucet gets rusty, the normal flow of water is interfered with. The rust accumulates around the inner sides of the faucet leading to blockage.

Frozen pipes

If you live in places that experience brutal winters, you will understand what frozen pipes can do. Frozen pipes can stop the flow of hot and cold water. They can also make the water to be lukewarm only.

The pipes should be thawed first to get the water flowing back normally

Airlocks in Pipes

Air can get trapped in the pipes altering the flow of hot water in the faucet it can lead to partial or total blockage of the pipes.

You can easily fix this by putting a horse pipe on the cold tap and joining it to the hot water tap and turning on the hot water tap. The water from the cold tap will pressure the airlock out. 

If the above method does not work, you will have to drain the whole system out which will require the help of an engineer.

Faulty Installation

If your water system was installed unprofessionally, it can lead to future issues. One of the issues can be the hot water from the boiler not reaching the faucet.

No Power Connection

Your gas or electric boiler can be disconnected from the power supply. You should always confirm that the power connection is on as someone might have switched it off.

Suspended Water Supply

The reason why hot water is not coming out of the hot side of the faucet can be that the water supply in your house has been suspended. It can be as a result of plumbing work going on in your neighborhood or just a mistake.

Leaked Water Pipes

Leaking pipes can reduce pressure especially when the water is dripping near the mainline. You should follow the water supply track, look where the pipes are leaking and dripping. A big leakage can stop water from coming out of the faucet. You should call a plumber if there are any leaks for assistance.

Check Cold Water

If there is no water coming out of the hot side of the faucet but the cold water faucet is fine, it can be an issue with the heater. Heater malfunction can be as a result of sediments building up, leaks, or the heater being unplugged.

You can try to fix this by flushing the water heater and allowing it to heat up then opening the hot side of the faucet. If the water does not heat up after flushing the heater you should call a plumber to help you determine the problem and assist in fixing it.

Clogged Pipes

If you have confirmed that the pipes are not leaking and the water is no hot water is coming out of the faucet, it might be that the pipes are clogged. The sediments can build in the pipes minimizing the water pressure or blocking the pipes completely.

You should call a plumber to inspect your pipes for any clogs.

Low Water Pressure

Low water pressure will make the water come off the faucet cold or lukewarm. Low water pressure can be initiated by clogged or leaking pipes.

Wrong Timer Setting

Boilers can fail to heat the water if the timer on the boiler is wrongly set. You should confirm whether the timer on the boiler is set right before opening the hot water faucet.

Check Every Faucet

You should check every faucet in the house to confirm if it is only one faucet with a problem or more than one. At times one faucet can block and interfere with the rest.

If you fail to identify the problem or don’t know how to go about it, call a plumber for assistance.

Check water main

It might not be a problem with the pipes or the boilers making the water not come out of the faucet, it can be that the water main is closed. If the main valve is closed, there will be no water coming out of any faucet.

Unwitting Boiler Restart

It is normal to experience power cuts in our homes, they make the boilers restart. When the power gets back, the boiler is reset to default.

 Problem with the Tap Washer

When taps get blocked, water will not come out of the faucet. This can be resolved by replacing the washer in the tap. You must close the source of water for that tap before you try to fix it.

If you do not know how to do it, hire a plumber to do the job.


There is no need for worries if there is no hot water coming out of the hot side of the faucet. There are several reasons that can lead to this problem. You will only have to identify the problem first to know if you can fix it yourself or you need professional assistance.

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