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Trari › Pine Hollow Auto Diagnostics
This week on the channel +429K views this week

Pine Hollow's Volvo needs a module, not another blower resistor

A used climate-control unit restores the S80's heating and ventilation after Ivan traces the fault through its communication circuits.

Channel: Pine Hollow Auto Diagnostics Story of Trari Newsroom

Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.

Volvo Major HVAC MALFUNCTION? ('11 S80: No Blower, Blend Doors NO COMM!)Volvo Major HVAC MALFUNCTION? ('11 S80: No Blower, Blend Doors NO COMM!)

Things we can learn from the video

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  1. 5:34Wiring diagrams identify the module's power, ground and LIN communication connections.
  2. 9:29Test-light checks confirm that power and ground reach the climate-control module.
  3. 9:45Both LIN communication lines remain high without data exchange on the oscilloscope.
  4. 16:11The blower-control signal shows weak amplitude and erratic dropouts.
  5. 19:56Ivan identifies an internal climate-control module failure rather than a faulty blower resistor.
  6. 21:00A closing update says a used replacement module restored the climate-control system.

The original blower resistor was fine. That is the useful twist in Pine Hollow Auto Diagnostics' most watched new upload: a Volvo owner had tried replacement resistors, but the problem lay elsewhere entirely.

Ivan's patient investigation of the S80 moves from wiring diagrams to a test light and oscilloscope. Power and ground check out, but the communication lines show no data exchange. The blower-control signal is weak and erratic, too. Rather than condemn the blend-door actuators or keep changing blower parts, he identifies an internal failure in the climate-control module. A closing update supplies the payoff: the customer plugs in a used replacement and the system works again.

The video has reached roughly 53,000 views. Beneath it, viewers discuss LIN-bus testing, the value of checking circuits before replacing parts, and their own hopes of keeping aging Volvos on the road. One particularly relatable observation concerns the door-warning chime: somehow, that always seems to work.

The other two uploads follow a classic Cadillac with a highway shake, repeatedly rebalanced wheels and an extra inconvenience acquired during the test drive: a driver's window stuck down. The follow-up tackles the power windows while brake parts are on the way, then returns to the road after replacing a brake hose. That second installment is currently drawing the channel's strongest daily audience.

Subscribers were unchanged over the week, while daily views are modestly above their usual level. Among nearby motoring channels, MattieFlips had a substantially larger weekly audience; Pine Hollow's weekly views were close to Autoalex v2's. Here, the week's distinctive pleasure was a diagnosis that saved a perfectly serviceable resistor from taking the blame.

Published on Trari

Where next?

More from Pine Hollow Auto DiagnosticsThis week on the channel +482K views this weekA used radio lets Pine Hollow's battery-draining Ford sleepIvan's three-upload week pairs a two-part Transit Connect diagnosis with a Saab whose throttle fault proves elusive.Channel: Pine Hollow Auto Diagnostics · Story of October 10, 2026 Also in Cars and motoringVideo taking off 18x its usual first dayPorsche from Samuel suggests a Targa-sized Christmas giftThe dealership sales Short pairs a Riviera Blue roof demonstration with a budget that has viewers joking about Hot Wheels instead.Channel: Porsche from Samuel · Story of November 9, 2026 A different discovery todayVideo taking off 12x its usual first dayKenan Thompson's Jeffries has a warning for Trump: "Knock it off, buster"SNL's post-midterm cold open crowds Trump, Vance, Hegseth and a real James Talarico into the Democrats' champagne party.Channel: Saturday Night Live · Story of November 9, 2026

What viewers say

  • Nice call, Ivan! You go the extra mile to test the circuits before throwing parts at it!
    @agostinodibella9939See it on YouTube
  • If only computer networks and modules were as reliable as open door warning "dinger".
    @TheOnespeedbikerSee it on YouTube
  • These S80's are so timeless, 15 years old car and it still looks good
    @lieutenantdan8170See it on YouTube
3 more comments
  • Very interesting and good to know! As the owner of a 2013 T6 XC70 I hope I would never need to know this. I am hoping to keep this Volvo for many years longer, I absolutely love it.
    @Paramount531See it on YouTube
  • FYI.... LIN bus normal no data state is at battery positive. All ends of the bus will have a weak pull up resistor.
    @laser-sjSee it on YouTube
  • " I think what is happening is someone is holding both these LIN lines up". I like how Ivan amthropomorphizes what turned out to be a bad module.😅
    @TheOnespeedbikerSee it on YouTube

Public comments from the video's page on YouTube

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The videos drawing views on Pine Hollow Auto Diagnostics right now

(Pt1) Classic Cadillac...HOPS on the Highway?? ('93 Sedan DeVille - D…47,500 views · 2026-11-07 (Pt2) Classic Cadillac...HOPS on the Highway?? ('93 Sedan DeVille - R…29,833 views · 2026-11-08
The facts
Subscribers
283,000
Channel views, last 7 days
429,066
Videos published this week
3
Video published
November 4, 2026
Video views so far
53,256
Views on its first day
38,658

The numbers

Here is how Pine Hollow Auto Diagnostics' uploads and audience moved over the week.

views gained this week: this channel and similar channels
The Daily Downshift
3,785,067
MattieFlips
1,400,479
Autoalex v2
444,818
Pine Hollow Auto Diagnost…
429,066
胖虎Yvette
218,232
Built Not Bought
176,927
Big Car
162,668
Rex H
148,077
The Skid Factory
60,681
subscribers
283,000
no significant change in the last 7 days
total views
119,659,714
views per day
77,882
typical day: 70,163
first-day views of each video posted this week
Volvo Major HVAC MALFUNCTION? ('11 S80:…
38,658
(Pt1) Classic Cadillac...HOPS on the Hi…
40,917
subscribers: this channel and similar channels
The Daily Downshift
294,000
The Skid Factory
291,000
胖虎Yvette
290,000
MattieFlips
289,000
Big Car
287,000
Built Not Bought
286,000
Pine Hollow Auto Diagnost…
283,000
Autoalex v2
283,000
Rex H
282,000
As of November 9, 2026 · Data source: Trari Social News, Trari Traffic Trends and Ranking Platform, Google YouTube
Subscriber, view, like and comment counts are YouTube's. Rates, usual days, rankings, comparisons and categories are Trari's own calculations.
Developed with YouTube

💡 Test your knowledge

Which classic Cadillac features in Pine Hollow's two-part highway-vibration investigation?