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Can't get any Heat

Posted By: Russ

Can't get any Heat - 11/18/08 05:29 PM

My 96 Ram truck just blows luke warm when I crank up the heater,any Ideas?

the radiator and hoses were replaced this past summer

Posted By: RapidRobert

Re: Can't get any Heat - 11/18/08 05:32 PM

thermostat

Posted By: 340dart4spd

Re: Can't get any Heat - 11/18/08 05:33 PM

Quote:

My 96 Ram truck just blows luke warm when I crank up the heater,any Ideas?

the radiator and hoses were replaced this past summer

plugged heater core possibly

Posted By: Russ

Re: Can't get any Heat - 11/18/08 05:33 PM

Replaced It with the new hoses

Posted By: GTXKen

Re: Can't get any Heat - 11/18/08 05:34 PM

I second the Thermostat

Posted By: Russ

Re: Can't get any Heat - 11/18/08 05:34 PM

Quote:

Quote:

My 96 Ram truck just blows luke warm when I crank up the heater,any Ideas?

the radiator and hoses were replaced this past summer

plugged heater core possibly

Hmmm,any way to tell?

Posted By: bboogieart

Re: Can't get any Heat - 11/18/08 05:35 PM

don't forget the temp. control valve in the heater hose, might not be opening all the way.

Posted By: Russ

Re: Can't get any Heat - 11/18/08 05:36 PM

Quote:

don't forget the temp. control valve in the heater hose, might not be opening all the way.

I'll have to look at that

Posted By: HealthServices

Re: Can't get any Heat - 11/18/08 05:52 PM

Quote:

Quote:

plugged heater core possibly

Hmmm,any way to tell?

Quote:

don't forget the temp. control valve in the heater hose, might not be opening all the way.

Check your temp gauge to see if the temp come up to correct temperature.

Use a temp gun if needed.

Check both lines leading into and out of the heater core. Both should be hot when the heater is on 'hot' If they are not both hot, water is not flowing thru. Check the heater control valve.

Posted By: IMGTX

Re: Can't get any Heat - 11/18/08 06:48 PM

Start with the coolant level. Low coolant can cause the heater core to run dry and then, no heat. It happens alot.

You may never even know it's low since it may not be overheating. Remember a truck's cooling systems has extra capacity for the extra loads they carry.

Posted By: Russ

Re: Can't get any Heat - 11/18/08 08:17 PM

Quote:

Quote:

Quote:

plugged heater core possibly

Hmmm,any way to tell?

Quote:

don't forget the temp. control valve in the heater hose, might not be opening all the way.

Check your temp gauge to see if the temp come up to correct temperature.

Use a temp gun if needed.

Check both lines leading into and out of the heater core. Both should be hot when the heater is on 'hot' If they are not both hot, water is not flowing thru. Check the heater control valve.

Temps are running normal,and the system Is full

Posted By: GoodysGotaCuda

Re: Can't get any Heat - 11/18/08 08:22 PM

*Low Coolant Level
*Air lock in the heater core
*Plugged heater core
*Stuck/sticking/fauly blend door or heater control valve (coolant)
*Thermostat

First thing to do is make sure the cooling system is full. Put the truck on an incline and let it warm up with the heater on full the entire time..running it without the cap may help as well (just be ready to put it on when the thermostat opens up). You may find some air works out and you gain your heat back. That is a very common occurance in german vehicles atleast.

Posted By: HealthServices

Re: Can't get any Heat - 11/18/08 09:40 PM

So what was the temp going into and out of the firewall on the heater hoses.

If it is hot going into and out of then look at the air blend door. It's under the dash.

Posted By: wildman340

Re: Can't get any Heat - 11/19/08 05:39 AM

If by chance the hoses to the heater core were "switched", that can cause no heat or very little.

Posted By: 74Sport

Re: Can't get any Heat - 11/20/08 06:24 AM

Quote:

don't forget the temp. control valve in the heater hose, might not be opening all the way.

I second the water control valve. Is yours actuated by vacuum or a cable? You might have a bad diaphram or vacuum leak.

Jerry

Posted By: Rug_Trucker

Re: Can't get any Heat - 11/20/08 06:51 AM

My 93 Cummins is luke cold!