Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

98 fiesta,1.3 heating stuck on HOT

  • 02-04-2011 6:33pm
    #1
    rodneys
    Registered Users, Registered Users 2 Posts: 95 ✭✭


    :eek:
    anyone know where the sensor that controls the heating is? mine is stuck on HOT , have tried replacing switches , fuses etc but no good,
    any help is appreciated


Comments

  • #2
    Buford T Justice
    Registered Users, Registered Users 2 Posts: 6,262 ✭✭✭Buford T Justice


    You sure its not cable driven?

    I'll check the TIS for you tomorrow evening.


  • #3
    rodneys
    Registered Users, Registered Users 2 Posts: 95 ✭✭rodneys


    not cable driven, electronic switch,
    thanks :)


  • #4
    Plug
    Registered Users, Registered Users 2 Posts: 9,248 ✭✭✭Plug


    rodneys wrote: »
    :eek:
    anyone know where the sensor that controls the heating is? mine is stuck on HOT , have tried replacing switches , fuses etc but no good,
    any help is appreciated
    The heater control valve is at fault. Replace it. Cheap easy fix.


  • #5
    rodneys
    Registered Users, Registered Users 2 Posts: 95 ✭✭rodneys


    whereabouts is it? :o


  • #6
    Plug
    Registered Users, Registered Users 2 Posts: 9,248 ✭✭✭Plug


    rodneys wrote: »
    whereabouts is it? :o
    Below the front window. Under the bonnet, you will see 2 pipes going onto it and 2 pipes going off it.
    f5fb_35.JPG


  • Advertisement
  • #7
    rodneys
    Registered Users, Registered Users 2 Posts: 95 ✭✭rodneys


    nice one, i was looking inside :o was told it was part of the control unit under the dash :mad:
    thanks :D


  • #8
    shamwari
    Closed Accounts Posts: 2,142 ✭✭✭shamwari


    There will be a two or three pin plug attached to the heater control valve. Disconnect it and see if the heater stays hot. If it does, the valve is shot. If it goes cold, chances are that it is the heater control in the car itself.


  • #9
    rodneys
    Registered Users, Registered Users 2 Posts: 95 ✭✭rodneys


    thanks guys, worked :D


  • #10
    thewheel2.0
    Registered Users, Registered Users 2 Posts: 1,066 ✭✭✭thewheel2.0


    Hi different problem for me, the fans in my car blow cold air out fine, but if you park up to do a maneuver or are parked up in traffic for long periods of time it starts firing out HOT air on the cold selection out of nowhere. Even blows slight air with fans at 0 when it does it!

    So is this a failing HCV? Id love if it was, thats cheap to fix and my car is going for a service soon. If it is the HVC ill let the mechanic know so he can order the parts.


  • #11
    Plug
    Registered Users, Registered Users 2 Posts: 9,248 ✭✭✭Plug


    The resister pack could be giving trouble causing it to run at 0. There is a test to carry out to confirm for a fecked HCV. Take off the plug, get a circuit tester and put it to earth and touch either one of the pins in the plug. It should light up when it touches live. so you know the live and obviously the other pin has to be earth. Thats how it works, the module earths it. So it you put the heat control on middle setting (blue/red) then you put the circuit tester on live on battery and touch the earth on the pin the light on the circuit tester should go on and off every few seconds. If this does not happen it could be the module or wiring and not the HCV.


  • Advertisement
Advertisement