Question about Cars & Trucks
Charlie, 1st thing is to check your fuses. I will post some links to help you see and solve problem. May not be your exact model but steps are basically the same.
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Posted on Feb 27, 2016
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Posted on Jan 02, 2017
There are known problems with this vehicle's heater core not getting enough coolant flowing through it to blow hot air.
1) Even if the coolant looks good, there are problems with the heater core plugging up. One solution is to use a heavy duty cleaner (CLR pipe cleaner) to back flush the heater core. To know if the heater core is plugged up, disconnect the 2 heater hoses at the heater core and somehow connect a hose to one end of the core. Try to flow water through, it doesn't have to be high pressure, and there should be a steady stream. If not, try to get the cleaner directly into the heater core and let it soak. Then back flush it and a lot of scale should be seen coming out.
2) The other problem is that since the heater core is the highest point in the cooling system air tends to get trapped in it. This should only happen if the coolant goes low or someone has opened the system to service it. There are a number of ways to bleed the system (vacuum bleed, pressure bleed). One of the hoses should have a small hole in it for bleeding air, pull that hose back just enough so the hole allows coolant to flow out of it. Then accelerate the engine and get a good flow coming out, when no more air bubbles are present, there should be good heat.
3)I've heard of bad water pumps with low flow causing issues as well as an aux. water pump not fuctioning correctly leading to poor heat output from the heater core. Someone should confirm this as I cannot get much information on the aux water pump(electronic pump by the alternator that is supposed to run after the car is shut off).
Hope this helps.
Posted on Jan 06, 2009
It may be the heater fan motor or connection to it .
I have replaced a lot of these that required a new connector to make then work....as the original connector semi melted at the fan motor.
Posted on Nov 02, 2009
SOURCE: 2001 Audi S4 Heater doesn't work
Thermostat has failed (stuck open) and needs replacement. It's a big job (5-6 hours charged labor for a shop), and requires the front of the car to be removed. Here's a pic of my car (B5 A4) a few weeks ago when I changed mine:
There's no way around it either - removing the front of the car is the only way to access it.
Posted on Nov 04, 2009
The fuse for these items is the second one down in the right hand row in the fusebox down by the driver's feet. Swap the fuse with another one to check.
Posted on Feb 27, 2010
if u remove the under cover in the passenger foot well, just turn the fan blower on full and hit the first thing you see when u look under the pass foot well with the palm of your hand and the blower should start to work.
Posted on Apr 23, 2010
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