What to do if the heating is not hot due to insufficient heating return water pressure? How to solve the problem of insufficient heating return water pressure

We all know that heating is an important way to keep warm in winter. Many people turn on heating in their homes, especially in the northern region. In the process of using heating, various problems will be encountered. Insufficient heating return water pressure leading to heating not being hot is one of the more common problems. So what should we do if the heating return water pressure is insufficient and the heating is not hot? Let's take a closer look!

What to do if the heating is not hot due to insufficient heating return water pressure

The return water pressure of the heating system is lower than the water supply pressure. If the pressure difference between the two is large, the heating will not heat up. This may be caused by the blockage of the heating pipes, which will cause poor water inflow, slow return water, slow water circulation in the pipes, and insufficient heat flow, resulting in the heating not heating up.

Heating pipe blockage

Heating pipe blockage is mainly caused by air blockage, impurity blockage, and filter blockage. Air blockage means there is air in the heating pipe system. Floor heating and radiators can be exhausted. Impurity blockage means there is a lot of scale, sand and other impurities in the heating pipes and radiators, which can be solved by cleaning the heating pipes and radiators. Filter blockage means the entrance valve of the heating pipe, some of which are indoors, and some are in the floor heating well. If it is not cleaned for a long time, it will cause pipe blockage.

Reverse Cycle

The return pipe pressure is insufficient, but the pressure of the water inlet pipe is lower than that of the return water, causing the heating water flow to circulate in reverse, and the hot water cannot enter the heating circulation. This situation rarely occurs, usually caused by the heating pipe being connected in reverse, or the booster pump being damaged, or the water supply pipe leaking.

Insufficient pressure

The return pipe pressure is insufficient, which may be due to the overall insufficient pressure of the heating pipe. Generally, the secondary booster station is not working properly, or the booster pump is damaged, resulting in insufficient overall pipe pressure, poor heating circulation, or no circulation. In this case, you can only ask the property or booster station management for repairs, usually the neighbors are not heated.

It is recommended to check whether the temperature and pressure of the heating water inlet pipe are normal. If the pressure and temperature of the water inlet pipe are normal, but the return pipe is abnormal, it is mostly caused by the blockage of the heating pipe. If the water inlet temperature and pressure are abnormal, there should be a problem with the outdoor heating system, such as insufficient heat, low water temperature provided by the heat exchange station, your home is at the end of the heating, and the heating is not hot; the heating station deliberately reduces the pressure and slows down the circulation, or the booster pump is damaged, your home is on a high floor, and the pressure is insufficient, etc.

Solution to insufficient heating caused by insufficient heating return water pressure

The return pipe pressure is insufficient. Check from the following points:

Close the main water inlet valve, disconnect the main return water valve at the joint, loosen the copper cap of the PPR ball valve, and disconnect the pipeline. Open the main water inlet valve, check the return water pressure, and let it drain out the impurities in the pipeline for a while. There will be 3 results:

(1) The pressure is insufficient at the beginning. By increasing the drainage pressure, the problem of insufficient indoor return water pressure can generally be solved.

(2) If the return water is normal after disassembly and inspection, you do not need to repair it. Contact the heating company. You cannot repair the unit return pipe. You need to check the main return pipe of the unit.

(3) If the drainage pressure is still insufficient after disassembly and inspection, it means that the indoor pipes are blocked. Disassemble the pipes in sections for inspection and cleaning, with the focus on the radiator. Disassemble the pipes at the radiator interface, where there are usually joints or PPR ball valves.

What is the reason why the heating is not hot?

The main reasons why the heating is not hot are as follows:

1. Exhaust

If the heater feels half cold and half hot, there may be gas in the exhaust pipe. At this time, you can gently unscrew the exhaust valve bolt to exhaust the air until water flows out and tighten the exhaust valve. If there is gas in the radiator, it will affect the heat dissipation effect of the radiator.

2. Obstructions

Sometimes you may feel that the living room is very hot but the bedroom is cold. Check if there are too many debris near the radiator. For example, placing too many clothes on the radiator will affect the heat dissipation of the radiator. Therefore, be sure to move the obstructions near the radiator to ensure smooth heat dissipation of the heater, thereby increasing the room temperature.

3. Water Leakage

The heating system is a closed water-gas circulation system. If the heating system leaks, it will directly damage the heating system. The heated water will flow out through the pipes, and the heat will be lost, and the temperature cannot be raised. If there is a leak, contact the maintenance personnel in time for repair.

4. The heating is old

Many traditional cast iron heaters in the north will rust after a long time of use, and the thermal efficiency will be relatively reduced, making it difficult to reach the expected room temperature. At this time, you should consider replacing the radiator. When buying radiators, try to choose brand products with guaranteed quality.

5. Heating is not effective

In the early stage of heating, the system is still in the trial operation stage, and the heating temperature is not high enough, resulting in the heating of users in the community not reaching the required temperature. This requires neighbors to consult and communicate with each other to see if there is a problem of heating not being hot. If it is confirmed that none of them are hot, they can contact the property company or the heating company to solve the problem.