locate ground/ open circuit on positive coefficient heater?
 

Hi I’m after some help locating and fixing an open circuit/ ground on PTC heater, positive temperature coefficient heater. I’m assuming there are lots of PTC and Vida doesn’t narrow down which one. Anyone with any experience in this that can help? Cheers declan

If the electric heater is open circuit best to get a new one..

A lot of people on here do not believe their car is fitted with one !

I’m happy to do that but Vida doesn’t say what PTC heater. I thought the heated seats, mirrors, heater would all be PTC. Do you mean the heater blower? Heater resistor? Or something else?

which model and year is yours? I thought you had diagnosed the PTC Heater faulty.. From 2007 with the new model ranges they used a PTC electric heater inside the heater casing, that is what the thick Red / Black wires are under the carpet L/H side passenger footwell towards the centre front near the pollen filter.

I should have said that really… it would help! It’s a XC70 D5 2008 manual. Vida says open circuit/ground on PTC heater. I know the one you’re on about, I did wonder if it was that one or not. Just wondering if there’s a way to confirm this would be my issue before ordering and commencing a huge job!

here is the diagram for you so you can do some tests, and those who don't believe there was one !

Thanks for the diagram, I know it does exist… but I can’t find a new part anywhere. Interestingly I was looking on the XC70 recalls, one was for short/open circuit on the PTC heater caused by it not draining properly. I think il give them a call tomorrow and see what they say!

any luck with it?

None as of yet. Took it to Volvo, they ran diagnostics and it came back blank! So that cost me £162. I got home and checked my Vida and I had DTCs so I wrote a complaint and I’m waiting the outcome. I can’t stand their attitude, chap on the desk just said it’s old it’s not worth it! Which I also complained about. I will choose if it’s worth it, it’s s shame really… the brand was always known for going for ever. Now all they want to do is sell you something else

Its nothing to do with the Brand of the car, Volvo still demand the highest standards, and all dealers are audited on it with mystery shoppers twice a year. The problem is with the individual and his/her attitude and the In-dealer training.. I would bet that individual has not been to Daventry on the service advisers training course. just complain to the dealer principle. Perhaps they have only been working there a week . who knows..