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Re: Radiator fans
Posted: Sat Jul 25, 2009 11:32
by texas2201
how do you tell which is which Alan?
Re: Radiator fans
Posted: Sat Jul 25, 2009 11:43
by amarshall
texas2201 wrote:One of my fans is now staying on when I switch the ignition on? it was fine before and it is a new fan fitted last year.
with the aircon on and the engine up to temp the other fan kicks in and this one stops? when the other one has cooled the engine and kicks off this one starts again
help! I replaced the relay but the problem is still the same
You have a change-over relay when what you need is either a twin or double make and break (I prefer a double as the two circuits are then isolated from each other a little)
This page :
http://www.autoelectricsupplies.co.uk/product_list/36 shows the most common relay types with their labelling so you can check what you actually have.
Re: Radiator fans
Posted: Sat Jul 25, 2009 11:51
by texas2201
my relays are 20/40 but with an 87 and 87a so angus you reckon the one with 87b is correct - I will hunt around and see if I can find one
Re: Radiator fans
Posted: Sat Jul 25, 2009 11:54
by amarshall
texas2201 wrote:my relays are 20/40 but with an 87 and 87a so angus you reckon the one with 87b is correct - I will hunt around and see if I can find one
87/87a = changeover
87/87b = double circuit.
87/87 = twin circuit
The difference between double and twin is minor and entirely inside the relay.
Re: Radiator fans
Posted: Sat Jul 25, 2009 11:57
by texas2201
Thanks Angus I only have 87a so will order a couple of 87b from that site
cheers
Martin
Re: Radiator fans
Posted: Sat Jul 25, 2009 16:24
by alanmoss
Sorry, been out; echo what Angus has said.
There is a link on the first page of this topic to a suitable supplier and part.
Re: Radiator fans
Posted: Sat Jul 25, 2009 16:59
by texas2201
cheers Alan - I have ordeered two of the right ones
but here is a strange one swapped the relays SA to SE and both are working correctly?
Re: Radiator fans
Posted: Tue Jul 28, 2009 13:21
by texas2201
texas2201 wrote:cheers Alan - I have ordered two of the right ones
but here is a strange one swapped the relays SA to SE and both are working correctly?
but only for a short period of time...........
fitted the correct relay this afternoon and the fan is no longer on permanently. However, the fans only cut in if the aircon and interior fan are on?
Anybody got any clues?
Martin
Re: Radiator fans
Posted: Tue Jul 28, 2009 13:50
by amarshall
texas2201 wrote:texas2201 wrote:cheers Alan - I have ordered two of the right ones
but here is a strange one swapped the relays SA to SE and both are working correctly?
but only for a short period of time...........
fitted the correct relay this afternoon and the fan is no longer on permanently. However, the fans only cut in if the aircon and interior fan are on?
Anybody got any clues?
Martin
AFAIK they should come on if aircon is on so that the condenser gets extra cooling - and aircon is only on if the interior fans are running - so that sounds OK to me.
Are you sure it's getting up to a temperature where the fans should kick in ? Is your otter switch OK ?
What happens if you bypass the otter switch ?
Re: Radiator fans
Posted: Tue Jul 28, 2009 14:23
by texas2201
temp gets up to the red and fans dont kick in
I will look at the otter switch and until I solve it I will keep the air con on
Are you sure it's getting up to a temperature where the fans should kick in ? Is your otter switch OK ?
What happens if you bypass the otter switch ?[/quote]
Re: Radiator fans
Posted: Tue Jul 28, 2009 17:10
by texas2201
it is the otter switch which is also blowing the 2amp fuse!
Re: Radiator fans
Posted: Tue Jul 28, 2009 17:45
by amarshall
Re: Radiator fans
Posted: Tue Jul 28, 2009 18:46
by texas2201
thanks Angus
Re: Radiator fans
Posted: Tue Jul 28, 2009 21:29
by texas2201
Thanks Jerry I have gone down the same route as Chris - all I need to do now is be able to swage - whatever that is?
how does that fit by the way?
Re: Radiator fans
Posted: Sat Aug 01, 2009 18:35
by texas2201
Well what can I say - replace a relay, a 2amp(?wtf is that all about) and fitted the same as Chris to sort my fans out. I even took off the bonnet for easier access! Nothing went wrong bar a few minor swearing moments...........but we will gloss over those.......
All sorted fans cutting in at 90 and going off at 80 marvelous
