MsChrissi Posted March 24, 2019 Report Share Posted March 24, 2019 2000 VNL 770 Detroit Auto Heater fan stopped working, 40A heater fuse designated : MF5 40A CAB HEAT is good. Any experience or insights? Pulled dash heat/ac control sub panel, looked good. Going to pull pass side dash covers and check fan connection. Quote Link to comment Share on other sites More sharing options...
Steve from SoCal Posted March 24, 2019 Report Share Posted March 24, 2019 I don't know about YOUR Volvo, many older cars and trucks have a resistor pack in the HVAC plenum to control fan speed. That or the fan motor has given up the ghost? Steve Quote 2005 Peterbilt 387-112 Baby Cat 9 speed U-shift 1996/2016 remod Teton Royal Atlanta 1996 Kentucky 48 single drop stacker garage project Pulls like a train, sounds like a plane....faster than a Cheetah sniffin cocaine. Link to comment Share on other sites More sharing options...
Sculptor Posted March 25, 2019 Report Share Posted March 25, 2019 16 hours ago, Steve from SoCal said: I don't know about YOUR Volvo, many older cars and trucks have a resistor pack in the HVAC plenum to control fan speed. That or the fan motor has given up the ghost? Steve Agree, the resistors don't usually give up all at once. The low speeds tend to go first. If some speeds are working and some not, that's the usual indicator in old cars. Quote Kevin and June 2013 Volvo VNL 730 D13 Eco-Torque @ 425 Ratio 2.47 2014 DRV 36TKSB3 Link to comment Share on other sites More sharing options...
MsChrissi Posted March 25, 2019 Author Report Share Posted March 25, 2019 We were rolling down the hiway then nothing, no speeds. Quote Link to comment Share on other sites More sharing options...
Radar274 Posted March 25, 2019 Report Share Posted March 25, 2019 Ours turned out to be the Fan Motor. Good Luck Quote Bob&Kay 2012 VNL730 I Shift D13 2.47 ratio 2018 Mobile Suites 40 kssb4 Link to comment Share on other sites More sharing options...
NeverEasy Posted March 25, 2019 Report Share Posted March 25, 2019 The fan motor for me, too. Replaced last year. Quote Chet & Deb '01 Volvo 660 w/ Smart '19 Forest River Columbus 320RS 5th wheel 2022 Chev 2500HD Long Bed Retired CWO4, USN and federal service Electronics Tech/Network Engineer/Welder/Machinist Link to comment Share on other sites More sharing options...
MsChrissi Posted March 27, 2019 Author Report Share Posted March 27, 2019 Fan motor? Oh joy, I’ve seen what it is going to take to get to that level. I wonder if I could get to the motor connector and apply some power from an external source and see if it runs before tearing into the air box? Quote Link to comment Share on other sites More sharing options...
ARGO Posted March 27, 2019 Report Share Posted March 27, 2019 Or test the fan leads for power. Quote You'd have to see the movie to understand.......... Link to comment Share on other sites More sharing options...
MsChrissi Posted June 17, 2019 Author Report Share Posted June 17, 2019 Problem solved! Got the fan motor assembly out and powered it off a battery... no joy. Ordered a new motor assembly on Amazon and once installed everything works like a charm. Quote Link to comment Share on other sites More sharing options...
Cotreker Posted June 22, 2019 Report Share Posted June 22, 2019 How much are these joyfull motors? Quote Volvo 670 / 2006 10-Speed ATV's & Sleds 2017 Host Mammoth Slide-In Camper on Deck Jackalopee Build article published here Link to comment Share on other sites More sharing options...
MsChrissi Posted June 24, 2019 Author Report Share Posted June 24, 2019 Go to Amazon, cheap is $60, expensive is $150, several in between. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.