Help! Winter is here and my heat isnt working

13Ram1500rezride · Nov 21, 2016

Its winter in Alberta. My passenger side has heat the driver side doesn't in my 13 Ram 1500. Overheated in the summer change the water pump, now recently changed the blendor actuator... Flushed the hoses... Still nothing on the driver side.. Can it be the heater core?

12sportmc · Nov 22, 2016

You can manually open and close the blend door, heat should move to your drivers side at that time. If not your actual blend door.(lol. Not blendor) could be broken. Esp likely since you replaced the actuator and there was no change in your situation. Good luck.

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Hootbro · Nov 24, 2016

If your heater core was bad, you would have no heat at all. Money is on your blend door repair not taking.

Cruizer · Nov 24, 2016

Did the actuator work when you put it in? Can you hear it when you switch over? I can hear my blend door close going between defrost and floor and back.

Snake_Eyes · Nov 30, 2016

Hootbro said:
If your heater core was bad, you would have no heat at all. Money is on your blend door repair not taking.

Not true. Chrysler is becoming notorious for casting sand filling up heater cores across their model line...the result in the case of my wife's '13 Wrangler is heat on the passenger side and freezing cold air on the drivers side. It's all due to the orientation of the core and how the vents split. Her Wrangler will be going in for $1k worth of surgery to fix it.

My '14 2500 has had the same symptoms since new and it's getting worse. Colder on the drivers side, burning friggin' hot on the passenger. I have the lifetime warranty though so I'm just waiting till it gets bad enough to take it in again. I read somewhere that 114 degrees is supposed to be the minimum temp for heat. So it'd have to be colder than 114 for them to consider it an issue. YRMV.

Hootbro · Nov 30, 2016

Snake_Eyes said:
Not true. Chrysler is becoming notorious for casting sand filling up heater cores across their model line...the result in the case of my wife's '13 Wrangler is heat on the passenger side and freezing cold air on the drivers side. It's all due to the orientation of the core and how the vents split. Her Wrangler will be going in for $1k worth of surgery to fix it.

My '14 2500 has had the same symptoms since new and it's getting worse. Colder on the drivers side, burning friggin' hot on the passenger. I have the lifetime warranty though so I'm just waiting till it gets bad enough to take it in again. I read somewhere that 114 degrees is supposed to be the minimum temp for heat. So it'd have to be colder than 114 for them to consider it an issue. YRMV.

I stand by what I said. The Wrangler arguement is a "non sequitur" statement.

As to your 14 2500, heat dispersion is controlled by the fan and blend door actuation. A defective heater core does not discern between what sides it chooses to push the control air to.

Smart mechanics money would go to where the OP last fiddled with it, his blend door actuator repair and go from there.

R.L.K. · Dec 31, 2016

You may have air trapped in your heater core , disconnect the two hoses going from the engine area to inside the cab , on the passenger's side , blow it out with low air pressure ( backwards ) then fill it completely with your PROPER coolant , reconnect the hoses . Now with the PROPER coolant type burp or bleed air from your coolant system with a kit like this .

Any Autoparts store sells similar products .

The most important step is to make sure your using the PROPER coolant and perform a good air bleed with heat full on .

Hope this helps !

Snake_Eyes · Jan 16, 2017

Hootbro said:
I stand by what I said. The Wrangler arguement is a "non sequitur" statement.

As to your 14 2500, heat dispersion is controlled by the fan and blend door actuation. A defective heater core does not discern between what sides it chooses to push the control air to.

Smart mechanics money would go to where the OP last fiddled with it, his blend door actuator repair and go from there.

As a follow up, I had the heater core of my wife's Wrangler replaced and the heat now works perfectly on driver and passenger side...it's like new again. Her symptoms were, NO heat on the drivers side, normal to slightly cool heat on passenger side. I have the core in my garage and plan to cut it open once it gets warm.

Murphy Slaw · Jan 17, 2017

Snake_Eyes said:
I have the core in my garage and plan to cut it open once it gets warm.

I don't think its EVER going to get warm once you take it off the vehicle.........

:naughty:

82Crew · Jan 17, 2017

As a actual Master tech I would guarantee it is the heater core being particularly clogged.

This is what happens at the end farthest from the heater hoses and the HVAC box is split even if you don't have dual climate. I have seen this in multiple vehicles and not just Chrysler. The way the heater cores are designed it is almost impossible to flush this junk out.

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Snake_Eyes · Jan 17, 2017

Murphy Slaw said:
I don't think its EVER going to get warm once you take it off the vehicle.........

HA! Nice one!

Snake_Eyes · Jan 17, 2017

82Crew said:
As a actual Master tech I would guarantee it is the heater core being particularly clogged. This is what happens at the end farthest from the heater hoses and the HVAC box is split even if you don't have dual climate. I have seen this in multiple vehicles and not just Chrysler. The way the heater cores are designed it is almost impossible to flush this junk out.

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And just like that, I'm justified!!! Thanks for that 82Crew!

Ramzaq · Feb 12, 2017

On the dual zone system you have a front door and a rear door with a front and a rear actuator, 2 of them, single zone only has the one on the front.

I would agree if you have heat on one side and not the other then it wouldn't be the heater core, it would be the door or the motor actuator.

Jerry10389 · Dec 10, 2019

Been doing a lot of research on the heater core issue. On my second one at 145K miles. First one clogged and was replaced at about 105K miles. Cut it open and it was packed with casting sand. Second one started to fill up again (evidenced by the heat going away slowly) and the mechanic used a pulsating flush to flush both the radiator and the core, heat is back to normal and really good. Plan to flush a couple times a year and see how that goes, only issue I've had with the truck. Others have had the issue with the dual controls and changing the core has fixed it every time from the limited info I have. No idea why, and the mechanic didn't know. Is the core partitioned or the air tubes? Either way, trying a diesel coolant filter on the heater lines as well to see if that works. Still cheaper than a core.

Jerry
2014 RAM 2500 6.4 Hemi - 145K miles

68PowerWagon · Dec 10, 2019

Jerry10389 said:
Been doing a lot of research on the heater core issue. On my second one at 145K miles. First one clogged and was replaced at about 105K miles. Cut it open and it was packed with casting sand. Second one started to fill up again (evidenced by the heat going away slowly) and the mechanic used a pulsating flush to flush both the radiator and the core, heat is back to normal and really good. Plan to flush a couple times a year and see how that goes, only issue I've had with the truck. Others have had the issue with the dual controls and changing the core has fixed it every time from the limited info I have. No idea why, and the mechanic didn't know. Is the core partitioned or the air tubes? Either way, trying a diesel coolant filter on the heater lines as well to see if that works. Still cheaper than a core.

Jerry
2014 RAM 2500 6.4 Hemi - 145K miles

Mine is barely blowing warm on both sides. I only have 50k on mine. Recon mine is already clogged?

Jerry10389 · Dec 10, 2019

Certainly possible. You can try to have it flushed. The pulsating flushes seem to work better than just flow. It must work stuff loose better.

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68PowerWagon · Dec 12, 2019

Yeah I think I am going to try flushing first since it is the easiest process. Hoping I or someone else doesn't have to get into the dash. Always seems like they never get put back together the same, so you end up with squeaks & rattles!

Jerry10389 · Dec 13, 2019

That’s true. Since my dash was removed I don’t have any squeaks or rattles, but my rear park sense doesn’t work. I don’t mind that much since I would always turn it off anyway. There is a lot of stuff back there that needs to be done to pull the dash.

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Help! Winter is here and my heat isnt working

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