Question about 2000 Ford F150 Flareside SuperCab

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Heater core for a Ford 2000 F-150 5.4 4x4 had been

A heater core for a Ford 2000 F-150 5.4 4x4 was recently bypassed in order to stop coolant fumes from entering the cab area and to temporarily continue using the truck. There wasn't any heat at all before this bypass. Is there a manual available for removing and replacing a heater core in a step by step procedure for a average machanic to work with?

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There is a Haynes Manual available for your vehicle @ most large Auto Parts stores. It covers how to do this. $25.00 for book.

Posted on Feb 03, 2010

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2 Answers

Heater blows cold air--where is heater control flap or switch?


These cars are notorious for having blocked heater cores, causing the heater to blow cold air. That's because there is a heater core bypass hose near the firewall that allows the coolant to bypass the heater core. Eventually the heater core fills with gunk and no coolant passes through it. You'll need to disconnect the hoses from the heater core at the firewall and flush the core using a garden hose. Flush both ways till water runs clear. If you can't access the heater core fittings at the firewall, then follow the hoses from these fittings back to the engine and disconnect them at that point and flush from there. If you flush from the hoses in this manner, it is important that you clamp off the bypass hose at the firewall with a vice grip pliers.
Otherwise the flushing water will go through the bypass hose and not the heater core.

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Dec 21, 2015 | 2001 Ford Taurus

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Heater doesnt work but ac does


Assuming the fan blows OK but you have no heat. Go to the firewall and notice where the heater hoses enter and exit the cabin. You'll notice a metal manifold and also a rubber bypass hose that connects the two. This bypass hose is a design problem and causes the coolant to bypass the heater core which is located inside the cabin under the dash. Over time, the heater core gets blocked by gunk and you'll get no heat. All the coolant flows through the bypass hose when this happens. The fix is to flush the heater core itself. It's difficult to access at the firewall, so I disconnect the two hoses at the engine itself and attach a garden hose to flush it. Before doing this you must clamp (vice grips) the bypass hose so that all of the water goes through the heater core.

Jan 24, 2014 | 2001 Ford Taurus

1 Answer

Heater is not getting hot enough


This is a very common problem on the Taurus, at least up until the 2001 model and possibly later. The Taurus design incorporates a bypass hose (near the firewall) that connects between the heater hoses entering and exiting the firewall in the engine compartment. As the Taurus ages (6 or 7 years old), the heater core under the dash increasingly gets clogged with gunk because the bypass hose provides a path for the coolant to bypass the heater core itself. The fix is to disconnect the heater hoses at the engine block (too difficult to disconnect these hoses at the firewall-no space) and flush the heater core through these hoses with a garden hose. Before doing this you must crimp (with vise grips and a rag to protect the rubber hose) the bypass hose--otherwise the flushing water will bypass the heater core. I attached the garden hose to an adapter that I could clamp into the heater hose to make the connection. BTW, the coolant in the radiator was a pristine lime green color -notice the dark brown color of the gunk flushed from the heater core. b4d9b81a-db6d-4a32-852d-2725671d69af.jpg d06ea83d-50ae-4178-a917-1275133ccd9c.jpg c195fd24-d013-4f9c-a878-5e49e1ff2612.jpg 2d1a9536-3c83-45c8-8d60-7eea7e95a4e8.jpg 1cc41e46-c4dc-4f8f-924c-4c751e5051f8.jpg

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Jan 02, 2014 | Ford Taurus Cars & Trucks

1 Answer

I put coolant in radiator and I get a/c but my heat doesn't work. I think my heater hose was bypassed by the previous owner. How do I fix the problem?


You should be able to look down in between the motor and the firewall and see if the heater hoses are attached to the heater core. Most of the time when they are bypassed it is because the heater core has started to leak. Instead of replacing the heater core (not a fun or easy job) they just bypass it so they won't leak coolant. So, if it is bypassed your probably looking at replacing the heater core in order to get heat.

Nov 09, 2010 | 1995 Pontiac Grand Am

2 Answers

Heater core keeps going out on my 2000 ford f-150 xlt with a 4.6 once i put one in it last about 2 weeks and goes out. any idea what is causing this?


YOU HAVE CLOGGED COOLANT BYPASS HEATER HOSE PIPE OR WATER PUMP BYPASS HOSE HAS.RESTRICTION CAUSING COOLANT FLOW PUTTING PRESSURE ON THE HEATER CORE MAKING IT RUPTURE.HAVE YOUR COOLANT SYSTEM FLUSHED.

Jul 31, 2010 | Ford F-150 Cars & Trucks

3 Answers

Radiator coolant fumes inside cabin


There is a chance you may have an engine bay coolant leak and the fumes are being drawn in through the heater ductwork so verify that first.
But....
Coolant fumes inside usually come from a leaking heater core. The heater core is like a small radiator inside your vehicle that gives off heat.
Problems like this arise from coolant that has not been flushed and creates an electrolysis that eats away at the material causing a leak.
This is not a job for a do it yourself guy(or girl). A pro could easily spend 5 to 7 hours changing this one.
Make sure whoever does this repair flushes the system.

Nov 04, 2009 | 2000 Ford Expedition

2 Answers

My heater not working, i replaced thermostat and radiator hoses, had radiator flushed and rodded, and still no heat. What is wrong?


Too much blockage in heater hoses or heater core.
Bypass valve may be stuck on "bypass" .

1. Remove bypass "Tees", but don't discard.
Replace with straight-through hose fittings.
The core may start leaking under the water pressure since there is no bypass hose.

Once the heater starts working, put Tees back in place. You need bypass protection or the engine will overheat.

Sep 25, 2009 | 1996 Ford F150 Regular Cab

4 Answers

When you bypass the heater core the path for the water to go through the core is gone. Correct?, you have connected to engine water line out to the engine water input? thus bypassing the heater core........


No, you just won't have water flow through the heater core, Coolant flows through the engine through the lower radiator hose as the water pump sucks it out of the radiator and pushes it through the engine. It then flows out the top radiator hose when the thermostat opens. It then flows into the radiator to cool off.

Is your heater core leaking?

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2 Answers

Smelling antifreeze


you likely have a leak in your heater core... any odd fogging on the windows ?

Robert

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1 Answer

Fumes that smell like antifreeze through vents!


well it could be a clog but i doubt it. sounds like you will have to replace the heater core and it takes all day as the entire dash and steering column has to come out.

Dec 22, 2008 | 2001 Ford Taurus

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