Is it normal for a furnace to blow cold air at first?
It’s normal for cool air to emerge from the vents at first because the furnace has to warm up. Think of it in the same way as turning on a hot water faucet; you’re going to get cold water at first. The same effect happens with your furnace. It must push out the cold air from the vents before the warm air can come.
Why does my water heater blow cold at idle?
Be sure to get all the air out once its flushed or it will have air in your cooling system. I did flush mine with straight water out of garden hose a few times and can now get better heat when at lower RPM’s but still goes cold at idle.
When does the car heater blow cold air?
I have 2006 VW beetle with the 2.5L engine. Once the engine has warmed to operating temperature, and I am driving it around, the heater works great. As soon as I stop at a red light, or am idling for any length of time the air coming out of the vents begins to lose temperature until it blows cool air.
Why does my Chevy Impala heater blow cold air?
The dampers for the duct work of heating systems are controlled by vacuum. If at idle and car is at operating temp with heater on and you feel air coming out the vents but its cold and without touching any controls you start to drive and warm air starts coming out of them I would check for a vacuum leak going to the controller.
Why is my heater not working in my car?
The other possibility is that the thermostat may not be allowing the engine to reach a normal operating temperature and since the engine’s warm coolant is the essential source of the heater core supplying heat to the inside of the vehicle, this can impact the warmth of the heat inside the vehicle.
I have 2006 VW beetle with the 2.5L engine. Once the engine has warmed to operating temperature, and I am driving it around, the heater works great. As soon as I stop at a red light, or am idling for any length of time the air coming out of the vents begins to lose temperature until it blows cool air.
Why does my hot water heater blow out cold air?
My heater blows out cold… You may have trapped air in the cooling system or the heater core may be partially plugged up. Engine coolant is delivered to the heater core through two heater hoses.
The dampers for the duct work of heating systems are controlled by vacuum. If at idle and car is at operating temp with heater on and you feel air coming out the vents but its cold and without touching any controls you start to drive and warm air starts coming out of them I would check for a vacuum leak going to the controller.
Why does my heater make a high idle noise?
Same thing with the heat. No heat till Im driving on the highway. I notice that while driving, there seems to be a high idle noise. When i turn the heater or the AC on, the high idle sound goes away. What may this be? 1998 Dodge Ram Van B1500 V6