PoochooTrain Posted December 9, 2010 Share Posted December 9, 2010 I've owned this 89 pathfinder for the last 2 years, I love it except the heater has always sucked. It's come to the point where it just has enough heat to keep the frost off the windshield and the temp just above freezing. I had a new rad and T-stat put in when I hit a deer last year. Does that mean my heater core is cooked? Before I got the new rad the fins were disintegrating to the touch, can I expect the same thing to have happened to the little heater core rad? Link to comment Share on other sites More sharing options...
RJSquirrel Posted December 9, 2010 Share Posted December 9, 2010 (edited) Assuming you have enough coolant in the system(purged of air with the bleeder screw) your heater core may just be clogged. Disconnect the heater core at the firewall, and use a garden hose to flush out the heater core. I got a sizeable amount of casting sand out. My heater worked quite a bit better afterwards. Also, look here... http://www.nissanpathfinders.net/forum/index.php?showtopic=28607 Edited December 9, 2010 by RJSquirrel Link to comment Share on other sites More sharing options...
MY1PATH Posted December 9, 2010 Share Posted December 9, 2010 (edited) I would think the heater core would be in much better shape than your old radiator because its sheilded forom the elements. follow the link above to check on coolant levels. Edited December 9, 2010 by MY1PATH Link to comment Share on other sites More sharing options...
Kingman Posted December 9, 2010 Share Posted December 9, 2010 Yeah. Pathfinder heaters kick ass when everything is correct. Mine gets hot enough to burn the tips of my fingers if I hold them against the vents. Link to comment Share on other sites More sharing options...
Daves94XE Posted December 10, 2010 Share Posted December 10, 2010 Something else to check. pull dash pocket out and take the ac/heater box clips off and look inside the condensor case to make sure its not stopped up with leaves and stuff. my ac was bearly blowing cold air and after it started running water in the floor i pulled it apart and sure enough it was almost completly plugged up with leaves and pine needles.also i don't know if your has one or not but if the engine temp gets up to normal but you still have no heat, look at the heater hoses and see if it has a water shut off valve in the lines. this valve shuts the hot water off to the heater core when the ac is run in the summer. either the valve could be stuck or the wire/cable broken.even if yours doesn't have ac it should still have one. if you pull the box apart and it's not plugged up pull the hoses off the heater core and use a garden hose to flush it out. don't have to turn the hose wide open but enough so you get pressure out the other line. Link to comment Share on other sites More sharing options...
ahardb0dy Posted January 6, 2011 Share Posted January 6, 2011 when I just replaced my thermostat and was refilling the coolant system, until I had the air flushed out really good the heat did not come out very hot at all, but once all the air was out the heat will burn your fingers now, you may want to follow the previous advice and make sure you have the system bled real good. Link to comment Share on other sites More sharing options...
Northernpathy Posted January 7, 2011 Share Posted January 7, 2011 Yeah the heater in my Hardbody is really, really damn hot. You are sweating bullets after 15-20 minutes of it running. Even on the lowest setting I have to crack the window open to keep things comfortable Link to comment Share on other sites More sharing options...
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