Flushed radiator and heater and now I have no heat.
#1
Newbie
Thread Starter
Join Date: Dec 2014
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Flushed radiator and heater and now I have no heat.
A few days ago I noticed my heat was coming out only luke warm when the truck was a operating temp and that it was taking very long for the heat to get to that warm state (~30 mins). I figured I should flush the heater core, and in doing so, I checked my radiator and noticed that the cap was dribbling some coolant out after the truck was shut off. I also noticed the coolant in the radiator was all brown and nasty, so I purchased a new cap, thermostat and a couple of bottles of coolant and water and flushed out the whole system.
By the end of the flush, both the radiator and the heater core were running clear water out. There was definitely some crap in both though. I installed the thermostat and gasket, put the new cap on and got the truck running to temp. I then put the heat on full blast and burped the system. But now, I have absolutely no heat. It's just the fan blowing air out of the vents. Both heater hoses feel cool to me, definitely not hot to the touch like the upper radiator hose is. Also, I noticed when I put the heat and fan on, that i can feel air coming out of the firewall where the heater hoses enter. Is that normal?
How should I go about getting heat back in my truck at this point?
By the end of the flush, both the radiator and the heater core were running clear water out. There was definitely some crap in both though. I installed the thermostat and gasket, put the new cap on and got the truck running to temp. I then put the heat on full blast and burped the system. But now, I have absolutely no heat. It's just the fan blowing air out of the vents. Both heater hoses feel cool to me, definitely not hot to the touch like the upper radiator hose is. Also, I noticed when I put the heat and fan on, that i can feel air coming out of the firewall where the heater hoses enter. Is that normal?
How should I go about getting heat back in my truck at this point?
#2
Seasoned Member
Join Date: Aug 2015
Location: New Jersey
Posts: 403
Likes: 0
Received 17 Likes
on
14 Posts
Year: 2000
Model: Cherokee
Engine: 4.0L
Sounds like something in the cooling system is still clogged up. Depending how sludged up the heater core was, it might not be possible to fix it with just a flush. I've seen heater cores that were pretty much solid with crap, the only fix was to replace them.
I would pull the coolant pipe off that connects to the water pump and heater hose and see if it's full of grime. Also maybe the thermostat housing again, since you said the heater hoses feel cool. How old is the water pump?
I would pull the coolant pipe off that connects to the water pump and heater hose and see if it's full of grime. Also maybe the thermostat housing again, since you said the heater hoses feel cool. How old is the water pump?
#3
Newbie
Thread Starter
Join Date: Dec 2014
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Sounds like something in the cooling system is still clogged up. Depending how sludged up the heater core was, it might not be possible to fix it with just a flush. I've seen heater cores that were pretty much solid with crap, the only fix was to replace them.
I would pull the coolant pipe off that connects to the water pump and heater hose and see if it's full of grime. Also maybe the thermostat housing again, since you said the heater hoses feel cool. How old is the water pump?
I would pull the coolant pipe off that connects to the water pump and heater hose and see if it's full of grime. Also maybe the thermostat housing again, since you said the heater hoses feel cool. How old is the water pump?
I've never replaced the water pump and I bought the truck 6 years ago... I'm assuming it's either original or very old.
Thread
Thread Starter
Forum
Replies
Last Post
51 ashton
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
07-19-2016 04:15 PM
moyneur
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
8
01-05-2016 08:41 AM
Jeep606
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
0
12-31-2015 03:28 PM
Steffen84
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
12-30-2015 09:57 AM
loganyar111
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
0
12-29-2015 09:18 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)