Rear Interior Heating Fan Not Working ***help Please***

[jackspud]

hi all

my problem is that my rear interior heating fan will not work near the n/s/r wheel arch, i have the electronic climate control unit fitted, front fan works perfectly but not the rear fan. can anybody tell me what fuse if any i need to check or could it be a relay problem.i am also have a problem with overheating when underload or going on a long journey, never over heats round town just on the motorway, i have changed the thermostat, checked water pump and radiator for blockage all ok, just stumped on this one. :rolleyes:

[geoffc]

Take out control panel....most likely tarnished contacts...wd40 etc works well!

[jackspud]

Take out control panel....most likely tarnished contacts...wd40 etc works well!

 

Thanks for your help will try that

[jackspud]

i soughted the problem of the none working rear fan, believe it or not it was not configered to work through the "pcm" took my car to work put "wds" on it and it was configered for front heater only not the rear. now it works perfectly. also cleared the other 6 fault codes that where there retested and no faults now recorded. the hext problem is the random boiling coolant on long journeys :lol:

[chromedome]

A few years ago I had a car that only overheated on long fast journeys.

 

After a lot of trial and error it turned out to be a water hose going too soft. As the flow of the hot water was high, as on a long journey, the hose would "pinch" together and restrict the flow of water and overheat. Changed hose....................problem solved.

 

So check all the hoses and check closely any soft ones.

 

Probably barking up the wrong tree but you never know. :lol:

[jackspud]

A few years ago I had a car that only overheated on long fast journeys.

 

After a lot of trial and error it turned out to be a water hose going too soft. As the flow of the hot water was high, as on a long journey, the hose would "pinch" together and restrict the flow of water and overheat. Changed hose....................problem solved.

 

So check all the hoses and check closely any soft ones.

 

Probably barking up the wrong tree but you never know. :lol:

 

Thanks i am grateful for any suggestions, as i am at the point of getting the head skimmed this week and a new head gasket, as i have run out of ideaswith it.

 

a few people have have had the same problem on this site but with no luck as of yet, so that will be my job today i will check all the hoses, thanks again

[raymac]

A few years ago I had a car that only overheated on long fast journeys.

 

After a lot of trial and error it turned out to be a water hose going too soft. As the flow of the hot water was high, as on a long journey, the hose would "pinch" together and restrict the flow of water and overheat. Changed hose....................problem solved.

 

So check all the hoses and check closely any soft ones.

 

Probably barking up the wrong tree but you never know. :lol:

 

Thanks i am grateful for any suggestions, as i am at the point of getting the head skimmed this week and a new head gasket, as i have run out of ideaswith it.

 

a few people have have had the same problem on this site but with no luck as of yet, so that will be my job today i will check all the hoses, thanks again

 

Jack , having read your posts and the symptoms i think it might be worth going down a cheaper route first and that would be changing the waterpump, although it is not showing signs of leakage it could well be the fins on the inside of the pump have broken or just worn away over time, personally i would try it and if it cures it then bingo if not when you have had the head skimmed and gasket done you will also have new pump fitted :(

[jackspud]

hi raymac

i have already removed the water pump its the cast iron fin type and theres no wear on it, i have also fully checked the thermostat to see that it opens at the correct temp. it is driving me nuts at the minute :blink: i drove 165 miles yesterday at 75mph using the cruise control and the temp stayed dead centre on the gauge. as i came back home i increased speed(say no more) and it started to get hot and then all the way over on the gauge and the red flashing light again. i stopped and it had pumped the water out of the expansion bottle. i am wondering if it is a hose or fault on the expansion bottle somewhere that is only showing up when it gets hot, thjere for not being pressurised and instantly boiling i am checking the system tomorrow with a pressure tester will let you know. thanks again everyone :D

[raymac]

hi raymac

i have already removed the water pump its the cast iron fin type and theres no wear on it, i have also fully checked the thermostat to see that it opens at the correct temp. it is driving me nuts at the minute :blink: i drove 165 miles yesterday at 75mph using the cruise control and the temp stayed dead centre on the gauge. as i came back home i increased speed(say no more) and it started to get hot and then all the way over on the gauge and the red flashing light again. i stopped and it had pumped the water out of the expansion bottle. i am wondering if it is a hose or fault on the expansion bottle somewhere that is only showing up when it gets hot, thjere for not being pressurised and instantly boiling i am checking the system tomorrow with a pressure tester will let you know. thanks again everyone :D

 

could well be a hose as someone suggested earlier, i personally don't think it would be head gasket/skim as driving at a steady 75mph it is ok, if head gasket was banjoed then it would overheat at all times, are you losing water? if not then that also suggests head gasket is ok,hope you sort it soon :D

[jackspud]

no sign of any leak from it and it does not use any water except when it boils, i think i am on the right track with it know, i hope so i will pressure test it tomorrow and let you know. :blink: