[wudshapr]

Hello, I was driving back from a three week stay in florida to my home in Minnesota and flipped on the heater around Iowa. It worked very well before heading down there, but not so much now. There is heated air coming from the passenger side blower, but just recirculated air from the driver side vents. Neither seem to be that strong, or blow with much force.. I was low on coolant, and was wondering if something may have arisen from that. THis is true for the defrost, and floor vents alike. Any advice would be appreciated, thanks.btw, i drove an 83 4x4 down, with 170k, and it never skipped a beat!

 

[fourwd1]

If you were low on coolant you may have an air bubble in system (heater core).

 

[Krusty]

heaters work on hot water,( 'coolant')----- if you were/are low------ dah !

 

[wudshapr]

i was hoping adding teh coolant would help, it truly was bone dry, I saw the temp gauge adjust ever so slightly higher and decided to check. Havent had this truck that long and dont know its quirks yet. it behaved the same after adding it, however. Would it still be possible for it to be a clogged core if the one side still heated properly? I also have the always cold "vent" issue as well, I have seen some refer to on this forum. THis may be a related issue?

 

[Krusty]

when you aded coolant, did you 'burp' the system ???
(add coolant, let it run til the thermostat opens, add more coolant , til the t stat opens again, every time there will be a bit of overflow followed by a great drop of coolant in the radiator--- until the truck will idle at running temp with the radiator cap off and the coolant stays in the radiator and you can see the flow from left to right-----)

( 1/2 of the heater core will NOT be clogged---)

you may have to lay on the floor and check the operation of the 'blend' door and make sure all the ducts are physically connected.---