right before the winter comes even tho it hasnt left yet. i want to sort out why i dont have hot air coming out. its weird because if i leave it of and let the engine get up to tempureture and then turn it on i get hot and then it goes cold and stays like it. we have allready tryed cleaning out the heater box and pipes before we fitted it back in and loads of rusty water come out. but after 30 mins it was running threw clean. i have new heater valve fitted so cant see a problem being that as that pipe gets warm. and the other one is cold? could it be the heater box gone? and is there anything else i could try? could it be a air block?
No Hot Air?
Started by
ToM 2012
, May 28 2013 05:47 PM
10 replies to this topic
#2
1984mini25
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Posted 28 May 2013 - 05:52 PM
leave it to run up to temperature when the thermoset opens, with the radiator cap off and the heater on full. you might need to run it at a fast idle for a little while but you should feel the heater kicking out nice warm air if all the airs out of the system.
#3
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Posted 28 May 2013 - 05:56 PM
leave it to run up to temperature when the thermoset opens, with the radiator cap off and the heater on full. you might need to run it at a fast idle for a little while but you should feel the heater kicking out nice warm air if all the airs out of the system.
will give it ago i did notice to when the engine was warm i just checked to see if the water level was ok and it gurgled abit . and i thought maybe thats solved it. but no still the same lol. how high would you rev it at?
#4
mab01uk
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Posted 28 May 2013 - 06:06 PM
How old is the heater matrix.......they catch all the crud and even flushing can't always dislodge enough....a new matrix often makes all the difference. Air locks can also prevent flow of hot water through the matrix......best to fill the heater via the heater pipes under the bonnnet at the highest point and then connect them quickly when water flows out so no air is trapped.....works for me.
#5
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Posted 28 May 2013 - 06:10 PM
the heater matrix come of another mini that was working but now it doesnt now i have fitted it in mine ile give that a try to if i take one pipe of then it should flush threw with high revs?
#6
1984mini25
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Posted 28 May 2013 - 06:12 PM
leave it to run up to temperature when the thermoset opens, with the radiator cap off and the heater on full. you might need to run it at a fast idle for a little while but you should feel the heater kicking out nice warm air if all the airs out of the system.
will give it ago i did notice to when the engine was warm i just checked to see if the water level was ok and it gurgled abit . and i thought maybe thats solved it. but no still the same lol. how high would you rev it at?
not by much, you should feel once you pick the revs up (stationary of course) the heater warming up, if you drop the revs back off and the heater goes back to being cold there's still an air lock somewhere and it needs running for a bit longer.
and you don't need to remove any hoses with the car running as it won't remove any trapped air somewhere in the cooling system.
Edited by 1984mini25, 28 May 2013 - 06:15 PM.
#7
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Posted 28 May 2013 - 06:26 PM
ok will give it ago if it fails all this then shall i get a new heater?
#8
gazza01
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Posted 28 May 2013 - 08:50 PM
you are pushing the heater control IN and not pulling it out?
#9
cradley-heathen
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Posted 28 May 2013 - 08:52 PM
if you remember tom i did fill the heater matrix through the coolant hoses with those cool little funnels you have, and when that didnt seem to help i did as mab01uk described and pulled the one hose off etc.
i must admit other than swapping the matrix i am at a loss as to why it doesnt get hot,
#10
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Posted 28 May 2013 - 09:21 PM
you are pushing the heater control IN and not pulling it out?
yes we push the heater control in its very weird does anyone have a good one around that i could try?
#11
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Posted 28 May 2013 - 09:24 PM
if you remember tom i did fill the heater matrix through the coolant hoses with those cool little funnels you have, and when that didnt seem to help i did as mab01uk described and pulled the one hose off etc.
i must admit other than swapping the matrix i am at a loss as to why it doesnt get hot,
o yeh you did. didnt it start coming out when you tipped it down the hole but when its attached to the engine nothing happens?
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