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Hot water heat is typically a closed system, and the pressure gage is used to determine if the system is full of water. Loss of water in a closed system will create air gaps in the water flow, and the boiler is not capable of heating air. Low water level arriving back to the boiler will trigger the high-temp shut off switch, and the water will not become hot.
Add water to the system and check the gage. To add water, open slightly the system drain valve (should be located in a pipe at the top of the system) and fill the system thru the inlet valve with a hose from a faucet until the spray from the open drain valve is solid. Close the drain valve system, and then close the inlet valve. Close the faucet valve and remove the hose.
What else can I help you with?
Would valve cover leak cause the car to stall?
I would not expect a valve cover leak to cause a car to stall. A valve cover leak can fill the spark plug area with oil which can cause rough running.
Can a radiator leak and i have no heat?
With no water no heat can be transferred through the heater coils.
Ram 1500 radiator leak?
Find leak, repair/replace cause.
How would a radiator cap cause a leak?
A radiator cap would not cause a leak! However, if the radiator cap is holding pressure, other weak parts could signal issues in need of attention.
What would cause a anti-freeze leak on a 1997 grand am gt?
radiator leak. try adding " leak stop"
Will a radiator leak cause overheating?
Yes, a radiator leak can cause the coolant levels to drop, leading to overheating. The radiator is responsible for cooling the engine, so a leak can disrupt the cooling process and result in the engine overheating.
Have water leak on a 4.6 32 valve v8 northstar engine in Cadillac deville?
waterpump or radiator hose
If the hose is leaking will it cause it not to run?
Having a leak in a radiator hose will have no effect on the engine running or not. However, in time the hose leak will cause the level of the coolant in the radiator to drop below a critical level and the engine will overheat.
Will a hole in the top of the radiator well cause a 1986 camaro to over heat?
Yes. This will cause the water to leak out under pressure and cause overheating. A hole like this should be repaired before driving too far in this vehicle.
What could cause steam in your bonnet?
Cooling system leak or engine overheating and steam escaping from the radiator cap.Cooling system leak or engine overheating and steam escaping from the radiator cap.
What would cause a water leak in your 98 Le Sabre?
Where is it leaking from? Could leak from the radiator, hoses, or water pump.
Can a stuck thermostat cause water leaks in radiator?
No. The only times the radiator would leak is if it was damaged, defective, or corroded.
