If a diverter valve is stuck, your radiators won’t be able to heat the room; The most common repair method is either cleaning or replacing the switching valve; Always contact a certified technician if you have a problem with your combi boiler, especially if it is still under warranty.
But in most cases the valve may be stuck and simply needs to be cleaned and reinstalled. The technician may choose to replace the entire idler assembly to prevent the new valve from sticking. You can also ask the technician to look at other parts of your boiler while the shell is off.
A diverter valve may be defective if the hot water taps are still working while the radiators are not turning on. Another sign of a faulty diverter valve is when you’re only getting lukewarm water from your taps.
One of the most noticeable signs that the air recirculation valve is damaged is your car running sluggish. Your car’s air-fuel mixture is very important to keep it running smoothly. A faulty air diverter valve will shed this mixture and cause the car to run and idle rough.
Turn off your heating. You cannot bleed a radiator when the heating is on as it may be too hot to touch. It could also splash hot water from the radiator. Use your radiator wrench to turn the valve on top of the radiator.
Replacing a shower diverter valve costs $225 to $575, including parts and labor. A shower diverter valve switches the flow of water between the bath spout or showerhead and is usually controlled by a small handle located on the center panel or near the bath spout.
The most common problem with a shower diverter is when water comes out of both the tub faucet and the shower head. Make sure no debris is clogging the shower diverter lever when fully raised or lowered. If everything looks clear, the problem could be worn parts in the shower diverter valve.
If you’re just working on the transition, you don’t have to turn off the water supply to the faucet. Place a cloth over the tub drain while you work to prevent dropped screws from going down the drain. Some showers use a diverter built into the tub spout that is activated by lifting a button on the spout.
You should call a Gas Safe registered technician if you need to replace the diverter valve or service the functional parts of the valve after diagnosing the problem. For a boiler less than eight years old this should not take more than an hour as parts should be readily available.
If you have hot water but no central heating then there could be other problems if it’s not the thermostat or boiler pressure. Common reasons for this particular error are ruptured diaphragms and airlocks or a motorized valve failure.
Squeeze and squeeze the diverter valve a few times, then spray an oil-based cooking spray on the plunger where it is visible. Pump the switching valve a few more times. This lube can help get into stuck parts and provide enough smoothness to get them moving again. Cooking spray is organic and safe to use.
Due to mounting the pump above the storage tank, air can collect in radiators. Rust in pipes or excessive sludge build-up can cause hydrogen to build up in the system. Leaks are often a cause of air accumulation in central heating systems.
Should I bleed hot or cold radiators? Always make sure your central heating system (boiler) is off and your radiators are cold before attempting to bleed them. When they are on, your radiators contain hot water and you could scald yourself if you vent them at this point.