If your radiator heater is making loud popping noises, there are several steps you can take: Bleed your radiator regularly: This process involves releasing trapped air from the radiator, which can reduce popping noises. Maintain a consistent heating level: Sudden temperature changes can cause popping noises. Watch on. If you can hear water running through your radiators, it could be an indication that you have air in your domestic central heating system. Air can get into the system when bleeding radiators, topping up pressure or when installation has been carried out. Air can often get trapped in the system, causing a rattling noise and can affect Hissing Radiators When a hissing sound comes from your radiator, you can bet that air is escaping from the system. In most cases, you’ll just need to replace the air vent – routine maintenance that should be done every decade or so. Gurgling Radiators As radiator noises go, gurgling is a great one to hear because it’s almost always easy Steps to Fix a Knocking Baseboard Heater. Remove the front cover and adjustable damper from the baseboard heater. Check for a plastic slider beneath the heating element at each metal carrier. If a slider has shifted out of position, center it on the carrier. If a slider is missing, replace it. If there’s a return pipe running along the top of A faulty fan can cause the engine to overheat and produce noise. Inspect the radiator cap: The radiator cap helps maintain the pressure in the cooling system. A faulty or loose cap can lead to coolant leaks and engine noise. Check the cap for any signs of damage and ensure it is tightly sealed. If the coolant is low, that could be a symptom of a leaking radiator. Refill the radiator or reservoir (to the cold full line) with fresh coolant and water (typically mixed 50/50). Remember NEVER remove the radiator cap when the engine is hot. With the engine cold and the radiator cap off, start the engine and allow it to come to operating temp. 5 Water Heater Sounds You Should Know. Banging/Rumbling: Banging and rumbling are among the most common water heater sounds. Typically, these noises can be attributed to excess sediment build-up. When enough sediment accumulates in your water heater tank, it may react with the heating element to create those little mini-explosions you are hearing. The steam rises up through a pipe to the radiator, filling the interior of the unit and pushing out any air through the air vent (that's the hissing noise you're probably familiar with). As the steam transfers its heat to the metal body of the radiator (which in turn heats the room), it condenses on the interior surfaces of the metal. Do: Tighten the mounting screws snugly enough so the radiator cannot move to alleviate potential vibrating/noise. Don't: Bend the tubes much. The harder the bend, the more likely it is to kink. So I have a used Holmes HOH3000 oil-filled space heater with adjustable thermostat. In the past couple weeks it's been making a loud high-pitched squealing noise when I try to turn it on. Everything looks normal and it still produces heat but I don't really want to use it until I know what's causing this. I haven't been able to find anything zP8X.