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Old 11-02-12, 10:58 PM   #1
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Default Heater working Intermittently

Hi all, over the last couple of days, the heater has failed twice. The reading on the display is fine but it only blows cold air. The problem disappeared after turning off the car for a few minutes and then it is fine on restarting. Anyone got any ideas??
Thanks
DOK
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Old 11-02-12, 11:02 PM   #2
davidireland
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Sounding like the start of the dreaded heater box flaps breaking.
Turn off all vents except the middle two above radio and set the temp to max. blower to max also.
Are the temps coming from both vents the same?
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Old 12-02-12, 10:42 AM   #3
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Hi David, just tried your suggestion. The vents were blowing hot air from both sides. Am I correct in saying that the flaps are what directs the hot air to different parts of the car? If so, if they were broken/ in the process of breaking, wouldn't hot air still be coming out of some of the vents and I wouldn't be able to direct it? What has happened ( on a couple of occasions) is that it's only cold air that flows from all the vents. I had a look at other heater problems on the forum and the fix seems to be to take the dash out and replace the heater matrix! That would cost huge bucks!
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Old 12-02-12, 10:47 AM   #4
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Usually when they break you'll have cold out one and hot oth the other.
Did you turn the temp up to max doing that test?
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Old 12-02-12, 10:49 AM   #5
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Crikey, I wasn't expecting such a quick reply!

Yes, I has both the heat and the blower up to max.
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Old 12-02-12, 11:55 AM   #6
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I wonder would it have anything to do with the thermostat? If so,would anyone know where this is located?
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Old 12-02-12, 11:57 AM   #7
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You could also have a problem with the exterior temp sensor on the passenger mirror ( its on one of them anyway)
Get a diagnostic check done and find out what the exterior temp sensor is reading.
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Old 12-02-12, 12:03 PM   #8
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I take it that wouldn't show up on the dash warning lights? Peugeot in Galway are charging 75 euro for a diagnostic though my local mechanic has some software with which he can read faults. I wonder are the 2 the same?
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Old 12-02-12, 12:06 PM   #9
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Quote:
Originally Posted by dokgolf View Post
I take it that wouldn't show up on the dash warning lights? Peugeot in Galway are charging 75 euro for a diagnostic though my local mechanic has some software with which he can read faults. I wonder are the 2 the same?
Arch Motors? I know them. Your local mechanic most likely won't be able to diaogue with the aircon ecu though.
What does your exterior temp read on the dash?
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Old 12-02-12, 12:10 PM   #10
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Says 9 degrees at the moment which I would imagine is about right. Mind you, it was saying 7 degrees last night when it was working properly ( and there was plenty of fog about at the time).
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