Question about Cars & Trucks
Reading low coolant heater cold air losing water noises coming from under dash
Add coolant. Find the leak and repair it. You won't have heat when the coolant is low.
Posted on Feb 18, 2012
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Posted on Jan 02, 2017
I would start by checking for coolant leaks. Common places would be in the waterpump or heater core. Heater cores can crack and leak. The heat from your vents inside the vehicle comes from air passing over the heater core, which is heated by the hot coolant flowing through the heater core. It acts in a similar fashion to your radiator, with the purpose of heat transfer. A coolant system that is low on coolant will not transfer heat through the heater core. Also, deposits from the coolant system can collect and plug the heater core which will restrict the flow and the amount of heat that is transfered to your heater. If you don't see coolant leaking externally, it may be leaking into the engine. this may be from a blown head gasket or warped head. If this is the case you may notice some whitish color smoke coming from the exhaust, as well as your coolant overflow/storage tank fluid level may increase.
The air conditioning is a seperate system and may be a seperate issue. The system contains liquid freon like a refrigerator. You can by recharge kits at your local autoparts store. If the kit works, you may find there is a leak in the system and you will loose cold air after some time. If thats the case, a certified dealer can fill the system with colored dye to help locate the leak. A bad compressor or evaporater can also cause a/c systems to fail.
Posted on Jun 10, 2009
If this noise is a clicking sound and is coming from the front center of the dash, then it may be the blender door motor which will require removal of the dash to replace it. It will keep the door from switching from heat to a/c. Does the odor smell like you have a freon leak in your a/c evaporator core or does it smell like a rat stuck in your heater and a/c ducts?
Posted on Oct 11, 2009
Replace your overflow cap. You usually don't see it leaking but the cap no longer holds the psi and the water comes out and dries quickly from the heat. Try replacing the cap and I think you will be surprised at such a simple problem can cause.
Posted on Jul 03, 2010
SOURCE: clicking noise under or
Your blend door actuator is stripping it's gears. Follow the noise, removing any panels in the way until you can get to the actuator. Take the connector off--it has 4 screws holding it to the heater box. Part looks like the picture below and costs about $35. Let me know if you have more questions.
Posted on Nov 07, 2010
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