Finding out that the hot water has stopped working can be frustrating, especially if we don't know the causes. This problem, although common, can have multiple origins. Fortunately, many of its solutions are also within our reach without needing to be specialists. In this article, we will provide you with a detailed guide with the possible reasons why hot water is not coming out and how to solve it step by step.
What to do if hot water does not come out
If you turn on the tap and expect hot water and you don't get it, it doesn't necessarily mean you need to replace your boiler or system. It's worth checking a number of factors before calling a technician. Here's how to deal with potential problems:
Check the fuse box
If you have a gas or electric boiler, the first thing you should do is check that there is electricity in the house. Check the fuse box and make sure that no circuit breaker has tripped. If so, turn it back on and see if the hot water problem is resolved.
Check the pilot light
Older boilers often have a pilot light that can be turned off. This small flame indicates whether the boiler is on. If the pilot light is off, proceed to reset it following the instructions in the manufacturer's manual. If your boiler won't turn on, it could be a gas-related problem.
Check the boiler pressure
The ideal boiler pressure should be between 1 and 2 barYou can check this on the boiler pressure gauge. If it is below 1, it will be necessary to repressurize it to reach 1,5 bars, which is the optimal value. If you cannot do it yourself, contact a technician.
Check the thermostat and water tank
If you have a conventional or system boiler, there may also be a thermostat on the hot water tank. Check that it is set correctly, both in terms of temperature and time. thermostat incorrectly adjusted could be the reason for the lack of hot water.
Restart the boiler
If everything seems to be in order but you still don't get hot water, try restart the boiler. The reset button is usually located on the front of the boiler. Following the manufacturer's instructions, you can reset the boiler to see if this fixes the problem.
Blockages and obstructions in pipes
Hot water blockage in the faucet can be a result of blockages or air in the pipelinesAir bubbles can block the flow of water. This problem can be solved by opening several faucets simultaneously or by contacting a technician who can safely flush the lines.
Defrosting condensate pipes
During times of extreme cold, condensate pipes can freeze, especially if the boiler is located outdoors. If this is the case, use hot water (never boiling) to thaw the pipes. A preventative option is to insulate condensate pipes with specific material to prevent them from freezing again in the future.
If you suspect this is the problem and you cannot solve it, do not hesitate to contact a specialized technician.
Electric heater and resistance problems
Another potential problem occurs in homes with electric heaters. If you notice that the water does not reach the usual temperature, it may be due to a resistance fault of the heater. This component is responsible for heating the water and if it fails, the water will never reach the desired temperature. In this case, it is best to replace the resistor.
What to do if there is no hot water in the shower
If you're only having hot water problems in your shower, the problem may be with your mixing valve. This valve regulates the flow of hot and cold water in your shower. If it's damaged or clogged, it prevents the proper supply of hot water from reaching you.
In this case, it will be necessary to replace the mixing valve for it to work properly. This spare part is usually accessible and can be fixed without any major complications.
Solutions for diverter valve
A damaged diverter valve can also be the source of the problem. This valve is responsible for directing the flow of hot water to the radiators or taps, as needed. If the valve is stuck in the heating position, you will have hot water on the radiators but not on the taps. In this case, the best solution is to contact a technician to replace the valve.
The gas heater does not heat the water
If the gas heater does not light, it may be due to problems with the gas pressure. Check that the the gas valve is fully open, as if it is partially closed, it may not generate enough pressure to heat the water. Also, make sure there is no lime buildup in the pipes, which could be obstructing the flow of hot water.
How to prevent hot water problems
Good maintenance can prevent most problems with your hot water supply. Here are some tips to extend the life of your boiler and avoid problems:
- Bleeding the radiators once or twice a year to remove accumulated air.
- Descale the pipes periodically, especially if you live in an area with hard water.
- Carry out periodic checks on the boiler to ensure that all its components are in good condition.
