#16: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Sun Apr 01, 2012 10:19 am ---- Well I just hope it's the relays and abit of wiring and I don't have to replace the whole unit. Do I get the relays from Peugeot themselves or anywhere else I could get them?
#17: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Sun Apr 01, 2012 10:20 am ---- Oh and cheers for all the help guys much appreciated.
#18: Re: Temp goes through the roof & no a/c now Author: GTI_89, Location: NewcastlePosted: Sun Apr 01, 2012 10:47 am ---- get the relays from pug, they aint to expensive.
can you turn the fan by hand? if so it isnt seized and id go straight for the relays tbh
#19: Re: Temp goes through the roof & no a/c now Author: kandlbarrett, Location: SwindonPosted: Sun Apr 01, 2012 11:25 am ---- Dannyskittle: if you are going to do this by changing components (I am tight and hate doing it that way) rather than fault finding then:-
1. Check the fuses that I listed first.
2. Check all the connections, unplug them and then plug them back in. That should be enough to clean any corrosion from the connections.
3. Look closely at the wiring to make sure it isn't badly corroded.
4. Replace the relays.
Hopefully it is simple and component changing will fix it - if I was to put money on it I would bet in order:-
Low speed fan relay.
Earth for Fan / aircon control unit.
Bad connection.
Fan resistor (rheostat) or connection.
For those who think the circuit is simple have them explain exactly how the two speed switching works and exactly how the aircon / fan control unit works. NOTE: the earth path for the relay coils is via the aircon / fan control unit. Last edited by kandlbarrett on Sun Apr 01, 2012 12:16 pm; edited 1 time in total
#20: Re: Temp goes through the roof & no a/c now Author: GTI_89, Location: NewcastlePosted: Sun Apr 01, 2012 11:29 am ---- get the relays from pug, they aint to expensive.
can you turn the fan by hand? if so it isnt seized and id go straight for the relays tbh
#21: Re: Temp goes through the roof & no a/c now Author: kandlbarrett, Location: SwindonPosted: Sun Apr 01, 2012 12:35 pm ---- Unplug the green temperature sensor. If the fan cuts in at high speed it is either the low speed circuit fuse (F38), the low speed relay, fan resistor, broken wire or bad connection.
If it doesn't cut in at all it is either the main fan fuse (MF2), fan ECU fuse (F37), fan relay, fan / aircon ECU earth, temperature sensor, fan, bad connections or broken wires.
After the initial test above the order of checking is still as previous post.
#22: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Sun May 13, 2012 8:47 am ---- Ok so finally got round to it, the relays snapped off, in the connectors, so dunno what to do there can I buy the whole lot, and also obviously it's been like this for a while because fan is really stiff, so off to pug to get fan and relays, but only worry is, is the relay pins are corroded into the connectors, wire them straight to the relays?
#23: Re: Temp goes through the roof & no a/c now Author: Deckchair5, Location: Bath UKPosted: Sun May 13, 2012 10:29 am ---- Maybe consider something like this as the relays come with connectors and fly leads to go straight in. You could install the relays somewhere less exposed then too <<click here
#24: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Sun May 13, 2012 6:09 pm ---- Yeah going to extend the wires anyway I think and put them up by ecu, as where they are behind the bumper is the worst place. Looks like I need a new resistor as it basically crumbled in my hand. Problem after problem, thanks for the reply.
#25: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Mon May 14, 2012 4:04 pm ---- Ok Guys really need your help, relays changed and rewired, resistor changed, fan works as I tested this by connecting straight to battery and it spins fine, so tested the car by starting it and letting it getto temp, but it had hardly reached 90 when the water bottle started over flowing, as the preasure was to great and started to boil out the top, so what is the engine actually hotter then what it's reading? But fan didn't kick in and the slow speed fan didn't come on when I pressed the air con button, And left it on for 5 mins, can someone tell me next steps in basically what I should do next? Thanks guys
#26: Re: Temp goes through the roof & no a/c now Author: Deckchair5, Location: Bath UKPosted: Tue May 15, 2012 6:56 am ---- If the engine coolant is boiling but the engine temp sensor isn't seeing it then maybe you have an airlock near the ETS. If the ETS is getting coolant but it's not showing high temp then ETS isn't good. If there's no engine hot water getting to the ETS then maybe the thermostat is jammed in the closed position
Feel the top hose going to the radiator from the thermostat housing. If it's not getting hot when engine is up to temp then you have no water flow so either airlock or jammed thermostat
If there's no flow at all or poor flow then there's the possibility of corroded vanes on the water pump
#27: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Wed May 16, 2012 7:02 am ---- The top hose gets hot, and the bottom hose gets hot, so there is flow, and I checked the for an air lock, well just coolant was coming out then topped up, no air what so ever, should I replace the ets? An see what that does? But surely the ets wouldn't matter when turning air con on? Surely the low speed fan should have come on?
#28: Re: Temp goes through the roof & no a/c now Author: Deckchair5, Location: Bath UKPosted: Wed May 16, 2012 10:38 am ---- The top hose gets hot, and the bottom hose gets hot, so there is flow,
yes so that's good and shows pump is working and thermostat is opening
and I checked the for an air lock, well just coolant was coming out then topped up, no air what so ever,
ok so that's good too but the question is why is gauge showing 90C when engine is boiling over?
should I replace the ets?
very possibly but you could check resistance at temps to see if it is telling lies or whether it's telling the truth and save yourself unnecessary expense
But surely the ets wouldn't matter when turning air con on? Surely the low speed fan should have come on?
That's correct
Many cars have two coolant temp sensors, one for dash gauge and rad fans (usually green) and the other for aircon (usually brown) .
If you disconnect the brown one does rad fan come on?
Has the engine overheated and head gasket gone? High coolant pressure and temperature are signs of head gasket failure
#29: Re: Temp goes through the roof & no a/c now Author: Dannyskittles, Location: WalsallPosted: Wed May 16, 2012 11:10 am ---- Don't think its the head gasket, as no signs, I mean the oil is fine, no gunky white stuff, I know sometimes you don't get that but just seems fine,
As for air con sensor well the air con light comes on but it makes no difference it's still warm, it just stopped working a while ago, thought it need re gasing and never got around to it, so what does this brown sensor do then? So if I unplug that, then turn aircon on, if it's working the fan should come on? So how would that brown sensor stop it? Sorry I just like to know what stuff does. But obviously I'm not getting high speed fan either as car boils, at 90 so I switch it off, how high should it get before high speed kicks in? As all this aircon stuff shouldnt affect the high speed fan should it? As don't they run on sort of separate systems?
#30: Re: Temp goes through the roof & no a/c now Author: Deckchair5, Location: Bath UKPosted: Wed May 16, 2012 2:03 pm ---- Don't think its the head gasket, as no signs, I mean the oil is fine, no gunky white stuff, I know sometimes you don't get that but just seems fine,
I hope it isn't too but it depends what channels are bridged with a failed head gasket. If it's oilway to coolant then you get the oil/coolant mix of the milky white stuff. If it's bridged between the compression bore and the coolant then you get over pressurised and extremely hot coolant all happening very quickly after start up with no affect on oil. It all depends what you're experiencing
If you've had no rad fan working on either low or high for a while then you are very likely to have over temped at some point, that will depend on your known history
AIRCON
If your air con needs regassing and it's insufficient for the compressor to be allowed to start then that will be why the rad fan doesn't start up either when you select air con. The pressurestat gives the ok for both to start
The brown coolant temp sensor is just for the air con system. Disconnecting it, purely as a test, will normally put the rad fan on high speed so it's a way of testing that side of the system
We are not responsible for comments posted by our users, as they are the property of the poster
Interactive software released under GNU GPL,
Code Credits,
Privacy Policy
Membership:
Latest: 
New Today: 0
New Yesterday: 0
Overall: 17132
Online Now [576]:
Visitors: 575
Members: 0
Staff Online Now:
Page Views:
General
