summit heater problem

I've read quite a few threads about how good summit heaters are, and how they get so hot you'll open a window etc.....

Well i'm nothing but displeased with my heater, there must be something wrong with it. It gets warm at best, and It's not even that warm.

I flushed the radiatior when I installed it, and put in a new 180deg t-stat, other than that, as well as letting the jeep get up to normal operating tempteratures and still just slightly warm air blows out.

I'm guessing it's just a defective heater maybe? Unless I'm missing something else

 

My heater works very well, check for any kinks in the hoses, may have air trapped in them. On mine, I also replaced the water pump. The old one was tired. Haven't seen one not work well with proper flow of coolent. Good luck.

 

are you sure water temp is hot . during winter months I always cover 1/2 of radiator . before that stock temp gauge wouldn't even move off of cold mark . I always thought that started after I put headers on it . gets warm now . even with stock heater

 

yeah
do that first then get back to us.

 

What they said about coolant temp. If the coolant is getting hot or has an air pocket so the coolant can't flow properly the heater can't work properly.


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Thanks for the replies guys. I'm guessing I still have Air in the lines, I flushed the radiator when I installed the heater.

To remove air bubbles I let it run for about 10 minutes with the radiator cap off, but maybe that wasn't long enough. I'm going to drive the jeep up on ramps and let it run for about 20 minutes with the radiator cap off and see if that helps.

 

well i believe it's a water pump issue if this makes sense... I don't think there is any coolant flowing to the heater, i can squeeze the lines with my hands while it's running. However the water pump works great as far as in keeping the jeep cool, it runs right at 180 degrees.

So is this possible to be the water pump if the pump still keeps the vehicle in normal temperature operating range?

 

going by the instructions there is no specific inlet or outlet, only on the heater model above mine, so it shouldn't matter how you route them. I guess I could always try to switch it

 

When you are letting the engine run with the radiator cap off, to purge the air, are you making sure the heater control is set to hot???

 

If the heater core is air-locked this can happen. Remove a hose, or both, at the heater, and "burp" any air. Filling from the heater end with a funnel may help.

 

Just as Patrick said, there is no heater control valve, it's just three different fan speeds. I did have the heater on high the whole time.

Thanks Petel, when I remove the hoses from the heater core tonight I'll put some fluid in the lines and see if that helps.

 

I am following your post with interest because I have the same issue with my aftermarket heater. I have replaced my water pump and thermostat and flushed the radiator. The dauntless engine heats up nicely, but very little heat reaches the heater core. I am convinced my problem must be in the heater core or an air lock. I am planning to disconnect the hoses from the heater and use a garden hose to force water back and forth through the heater core. This has worked well on my daughter's XJ to force the sediment out of heater core and restore water flow. It should also be obvious if you are getting uninstructed flow through the heater core.

 

A photo of the hose hookup at the engine would help.

You should have one hose at the output of the water pump, and the other returning to the engine somewhere, on a normal V6 or V8 it will usually be in the intake manifold. Dont try to hook both hoses up to the intake manifold.

 

I have one hose going from the water pump to the heater core, and one hose going from the heater core to the intake manifold.

 

I have the stock dauntless intake manifold, it's still located on the back of the intake manifold.

 

Well........................... as embarrassing as this is, I figured out the problem, and I figured I'd share in case somebody has a brain fart like I did.


I didn't even pay attention when I installed the heater, I just mounted it, and hooked up the hoses, but yes they do come with plugs in the lines.



Sorry for wasting your all's time, but I appreciate your help!

And yes this heater does work as good as everyone says, it warms up real fast, and after a while gets pretty dang hot.