heater

[Lonesome]

I'm have problems with my front and rear heat. It only gets warm. I've flushed the system and core's,changed the tstat, burped the system and even took the dash out check the blend door and a motor for it. Have hot water going in and out of cores but only warm heat. The higher I try the fan speed up the cooler the air gets. It's an 01 E.B. with E.T.C. Is there anything else I can check before I take it to the shop and spend way to much to have this fixed. Any help will be great!!!!!!!!!

 

[rtbrjason]

I'm have problems with my front and rear heat. It only gets warm. I've flushed the system and core's,changed the tstat, burped the system and even took the dash out check the blend door and a motor for it. Have hot water going in and out of cores but only warm heat. The higher I try the fan speed up the cooler the air gets. It's an 01 E.B. with E.T.C. Is there anything else I can check before I take it to the shop and spend way to much to have this fixed. Any help will be great!!!!!!!!!

I am having similar issues. It was also taking a long time to heat up on cold starts. I changed the fan clutch and that seems to have solved some issues. I just did the tstat as well but haven't had much chance to see how the heat is yet.

 

[Lonesome]

The only things I haven't done is change the fan clutch and water pump

 

[qcksnake]

check the blend doors in the heater/ac box. Possible somethings stopping it from closing off the ac condensor part and all the air isnt being directed over heater core.

 

[QbanCgar]

from what i understand, there may be more than 1 blend door. i was having issues w/ my heating. it was only heating the rear 2 sections of the truck but blowing cool air in the front. mechanic had to remove the entire dash & access the blend door & replaced something else while he was at it. i'll have to see if i have can find the invoice.

 

[Lonesome]

Yea do that for me. I'm going to replace the water pump in the next couple of days and see if that helps any.

 

[stamp11127]

Before changing parts to see if that is the problem, get some facts.
When you flushed the system did a bunch of crap come out?
Have you checked the temp of the heater core supply lines with the engine hot? The return line should be just as hot if the fans aren't running. If the feed line is warm but not hot, you have a blockage to that line.

 

[Lonesome]

stamp11127 I've got hot water going in and out as long as the heats not on. As soon as I turn the heat on the water coming out starts cooling down. I replaced the water pump this weekend. After doing that as long as the truck is moving the heat gets warm but not hot. And as soon as i stop at a light or stop sign or something the heat starts getting cold front and rear. I'm out of idea's dose anybody else have any?????????????? Also dose anyone know if it would make a difference if I take out the restrictor out of the inlet hose??

 

[JUST4FUN]

what brand tstat did you use ? if its not a Motocraft replace it with one.

 

[stamp11127]

Your first sentence has given me another clue. I'll look at the wiring diagrams after work. The ETC may have solenoids/flow valves controlling the coolant flow. If it is "confused" it would make sense on cutting the flow when the heat is on.

 

[Lonesome]

@Just4fun it wasn't a motorcraft but it was doing the samething with the factory one. I tried the self test on the ETC. The only thing that happened was the lights went around in a circle then all the lights on it lit up and that was it.

 

[JUST4FUN]

is the cooling system holding pressure including the cap? if the cap is not holding this might be a problem too

 

[stamp11127]

According to the wiring manual there isn't anything that varies the coolant flow to the heater core.

Insufficient, erratic or no heat -

Low engine coolant level.
Engine overheating.
Plugged or partially plugged heater core.
Temperature blend door binding/stuck.
A/C electric blend door actuator.

The first thing I would look at is the coolant level.

If you have the tool to disconnect the lines from the heater core, you could monitor the coolant flow from the supply line once the heat is turned on. Add a hose and hose clamp to the pipe on the intake, drop the line into a bucket to save the coolant.

 

[Lonesome]

@Just4Fun I'm pretty sure that it's holding pressure because the hoses get firm and I replace the cap also. Do either one of you think it would make a difference if I took the restrictor out of the inlet side and see if that makes any difference. And dose anyone have a vac. hose diagram for the heating system??

 

[stamp11127]

The main thing that pressurizing the cooling system does is raise the boiling point of the coolant. Wouldn't matter if the system was pressurized or not for testing.
The flow restrictor won't have an effect unless it is blocked. Its purpose is to balance the flow between the two heater cores. Since your lines get hot, there shouldn't be a problem. Unless there is still crap and it is plugging them.
When you cleaned the system how much crap came out? How much was in the block when you changed the water pump?
May want to disconnect the supply line from the manifold and see if there is any blockage in the line.

 

[Lonesome]

nothing really come out of the system and the block was clean.

 

[stamp11127]

Still sounds like a coolant level problem. Since both lines get hot that would eliminate a complete blockage. You have heat in the beginning, that rules out the blend door being in the wrong position.
Park on a steep incline so that the radiator is above the heater cores. Run up to temp, usually this will move any trapped air to the higher spot of the system. Let cool off and see where the level is in the expansion tank.

 

[786jayone]

EATC DEFECTIVE


Sent from my iPhone using Tapatalk

 

[Lonesome]

I think that the problem might be fixed or atleast better than before. This weekend I went back and flushed each heater core again. This time the water was really dirty unlike last time. Unstead of just putting coolant in the tank I filled the heater core lines first with a persureized pump sprayer to make sure that I got out as much air as possible. Then hooked the lines back up, then filled the tank. The front still isn't as hot as I'd like but the back is hottt. @Stamp11127 I think I'll try your idea tomarrow and see if that helps the front. Thanks guys for the input.... I'll let ya'll know how it comes out..

 

[Lonesome]

I've noticed another problem today. When I turn the vent on I have heat front and rear but when I turn on the defrost on both front and rear get cold. Floor have heat, vent have heat,panel have heat, just no heat on the defrost mode. Anybody have an idea?????????