gj1982 Posted June 8, 2011 Share Posted June 8, 2011 Hi, I was wondering if someone could help me. I;ve got a Ford Puma which has the age old heater problem (constantly blowing hot air) so I think it may be the HCV. However I took off the electrical connector and applied a multimeter to test - when i used the chassis as a ground i got just under 12v (11.79) which was constant when i turned the heater from midway to cold. Out of interest I tried with the heater on hot and put the negative into the connector (this connector is just the two wires) and got a reading of around 3v. Does this sound right? I'm not too familiar with multimeters so may have had the wrong setting or something?! Quote Link to comment Share on other sites More sharing options...
btmaldon Posted June 9, 2011 Share Posted June 9, 2011 I cant remember what the meter readings should be, but the problem is normally the solenoid getting stuck in the HCV. I suggest that when connected to both the positive and negative feed, there should be a significant difference in reading hot and cold. If not, the only other problem, will be the heater control panel, which is attached to the rear of the heater control knob. I had to replace the one on our Puma when we had one. I had tried two HCV's, before I realised what the problem was. Good luck Quote Link to comment Share on other sites More sharing options...
gj1982 Posted June 9, 2011 Author Share Posted June 9, 2011 Thanks for the reply - I have tried another HCV (though admittedly this was second hand off another car) and also another heater control panel with no change. I don't really see how it can be the HCV if those meter readings are coming out so strange - perhaps its a wiring issue? Possibly expensive?! :( Quote Link to comment Share on other sites More sharing options...
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