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Topic: temprature gage going down and no heat in car (Read 780 times) |
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smiler
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temprature gage going down and no heat in car
« on: Dec 3rd, 2008, 10:27pm » |
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I have 2.5tdi and at the moment it temp goes down on motorway and also the heater is not operating at it usual hot self its loop warm I have taken the engine sheald off the bottom would this affect the temp.please help
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mijfife
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Re: temprature gage going down and no heat in car
« Reply #1 on: Dec 3rd, 2008, 10:54pm » |
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Hi Smiler, it would be worth checking if the electric fans are running all the time. Failing that, it could be a stuck open thermostat. My temp gauge drops too but the heater is working fine (thankfully) so I'm sure it's just a dodgy temp sender switch. I'd change it if I could work out which one it is 
Cheers Jim
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'96 2.5TD Ultima estate running on veg oil!
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gozz
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Been around awhile
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Re: temprature gage going down and no heat in car
« Reply #2 on: Dec 3rd, 2008, 11:27pm » |
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Smiler.
If your heater is OK when the temp gauge is up (if it goes up) the thermostat will be faulty.The under cover missing will not affect the water temp.
GOZZ.
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python9
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1997 24v ghia saloon
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Re: temprature gage going down and no heat in car
« Reply #3 on: Dec 3rd, 2008, 11:48pm » |
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on Dec 3rd, 2008, 10:54pm, mijfife wrote:Hi Smiler, it would be worth checking if the electric fans are running all the time. Failing that, it could be a stuck open thermostat. My temp gauge drops too but the heater is working fine (thankfully) so I'm sure it's just a dodgy temp sender switch. I'd change it if I could work out which one it is
Cheers Jim |
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so does mine jim after i changed the thermostat
when i am stop and runing short runs it sits mid way when i move longer distance it moves down to just above the white mark above cold but my heater are hot no problems no matter where the guage sits
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python9
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1997 24v ghia saloon
Posts: 241
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Re: temprature gage going down and no heat in car
« Reply #4 on: Dec 3rd, 2008, 11:58pm » |
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on Dec 3rd, 2008, 10:27pm, smiler wrote:| I have 2.5tdi and at the moment it temp goes down on motorway and also the heater is not operating at it usual hot self its loop warm I have taken the engine sheald off the bottom would this affect the temp.please help |
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if it does'nt open your heaters will be cold and it will overheat or just opens slightly it will be luke warm best to take out the thermostat test it in some really hot water to see if it opens if it opens only a little change it dont get it from ford £60 get it from vauxhall
£40 ask for one for a 1995 on frontera 2.5 tdi they have the same engine as the scorpio i had the same problem as you last week i changed the thermostat and it cured my problem
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: temprature gage going down and no heat in car
« Reply #5 on: Dec 4th, 2008, 2:00am » |
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 ....classic symptoms of a stuck open T-stat......engine temp fine around town but gauge drops when on a run 
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python9
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1997 24v ghia saloon
Posts: 241
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Re: temprature gage going down and no heat in car
« Reply #6 on: Dec 4th, 2008, 12:36pm » |
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on Dec 4th, 2008, 2:00am, Jonnycab wrote:| ....classic symptoms of a stuck open T-stat......engine temp fine around town but gauge drops when on a run |
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are you sure i have just put a new thermostat in my tdi
and i dont have any heat issues
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smiler
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Re: temprature gage going down and no heat in car
« Reply #7 on: Dec 5th, 2008, 10:24am » |
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thank you all we have replaced thermostat and all seems well at the moment thermostat 12 pounds factors why don't they supply gaskit with themostat thats what I want to know .
thakyou every body
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: temprature gage going down and no heat in car
« Reply #8 on: Dec 5th, 2008, 3:20pm » |
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on Dec 4th, 2008, 12:36pm, python9 wrote:
are you sure i have just put a new thermostat in my tdi
and i dont have any heat issues |
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You've probably got a dodgy temp gauge sender then if the heater stays hot
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python9
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1997 24v ghia saloon
Posts: 241
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Re: temprature gage going down and no heat in car
« Reply #9 on: Dec 5th, 2008, 5:04pm » |
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on Dec 5th, 2008, 3:20pm, Jonnycab wrote:
You've probably got a dodgy temp gauge sender then if the heater stays hot |
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and that was new 3 months ago when i did the head gskets as when they blew they melted the temp sensor
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: temprature gage going down and no heat in car
« Reply #10 on: Dec 5th, 2008, 7:24pm » |
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I've found temp gauge senders to be pretty unreliable. In the 3 years I've had the Scorp, I've had 4 new temp gauge senders, as they keep failing 
Another thought....maybe it's the gauge itself. Had a similar problem with the wifes old Mondeo, gauge would suddenly drop down to about quarter, stay there for a bit & then rise back up to the middle. Changed the t-stat & gauge sender & the cooling fans worked as they should.....so I just put it down to a dodgy gauge.
As the car was running fine & the heating was still nice & hot, I just couldn't be bothered to worry about it anymore .....
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python9
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1997 24v ghia saloon
Posts: 241
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Re: temprature gage going down and no heat in car
« Reply #11 on: Dec 5th, 2008, 9:04pm » |
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on Dec 3rd, 2008, 11:48pm, python9 wrote:
so does mine jim after i changed the thermostat
when i am stop and runing short runs it sits mid way when i move longer distance it moves down to just above the white mark above cold but my heater are hot no problems no matter where the guage sits |
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there is black one and a green one on heads 3 and 4 at the back head 4 is green thats the temp sender the other one on head 3 i dont know what thats for that is black
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python9
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1997 24v ghia saloon
Posts: 241
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Re: temprature gage going down and no heat in car
« Reply #12 on: Dec 5th, 2008, 9:06pm » |
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on Dec 3rd, 2008, 10:54pm, mijfife wrote:Hi Smiler, it would be worth checking if the electric fans are running all the time. Failing that, it could be a stuck open thermostat. My temp gauge drops too but the heater is working fine (thankfully) so I'm sure it's just a dodgy temp sender switch. I'd change it if I could work out which one it is
Cheers Jim |
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its green and is on head 4 under the edge of the header tank above the desiel filter
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