This is the stand alone interview from the June 7, 2025 Hour 1 Show.

Ron Ananian ("The Car Doctor") and Isaac Nielsen of Mahle Aftermarket discuss modern automotive A/C systems, focusing on R-1234yf refrigerant and the importance of proper service equipment.

• R-1234yf replaced R-134a and requires stricter handling due to contamination risks.

• All A/C machines now include oxygen sensors and refrigerant identifiers to ensure refrigerant purity (≥98%) and prevent system damage.

• DIY charge kits and low-quality refrigerants (especially imports) can harm vehicles and equipment.

• Maintenance tips: Check filters for discoloration, clean internal lines with isopropyl alcohol, and flush hoses weekly.

• Oxygen sensors degrade over time, even in storage—only buy replacements when needed, as early shelf life affects performance.

🔧 Bottom line: Use quality refrigerant, maintain your machine, and monitor sensors to avoid costly failures.

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• Live Call In Show Saturdays 2-4PM Eastern Time 

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In this Stand Alone Interview from the June 7th, 2025 Show: Ron Ananian, The Car Doctor sits down with Scott Brownstein of CRC Industries to talk about a wide range of topics and service procedures do's and don'ts for successful auto repair results.

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• Live Call In Show Saturdays 2-4PM Eastern Time 

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Ron Ananian, The Car Doctor, opens the hour with Cherokee Heart from Mahwah Ford, discussing how tariffs are beginning to impact car prices—particularly for the Mach-E, Maverick, and Bronco Sport. While Ford is absorbing some of the cost increases, buyers may still see higher prices. Financing remains accessible even for those with fair credit, and although leasing has become more expensive, Ford is offering attractive incentives. Cherokee advises acting now before tariff-affected inventory hits the lots.

In the second half, Ron speaks with Isaac Nielsen of MAHLE Aftermarket about the industry’s shift to R-1234yf refrigerant, now standard in most vehicles since 2013. Unlike older A/C systems, modern machines include refrigerant identifiers and oxygen sensors to ensure at least 98% purity. DIY recharge kits can pose risks due to impure blends or excessive dye and oil. Isaac stresses the need for regular maintenance, including filter checks, hose flushing, and line cleaning. Oxygen sensors naturally degrade with air exposure and must be stored correctly. Neglecting care can result in costly equipment damage.

Visit us at https://www.cardoctorshow.com

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• Visit our You Tube Channel for auto repair tips and videos 
• Call Into The Car Doctor Hotline 24/7 (855)560-9900   
• Live Call In Show Saturdays 2-4PM Eastern Time 

   

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On this episode of The Car Doctor, Ron Ananian helps a caller with a 2002 Isuzu Trooper that lost four-wheel drive. He advises scanning for common fault codes tied to speed sensors or the vacuum switch but warns that parts for old Isuzu's are hard to find, which may make repair impractical.

Ron also addresses a prior caller’s claim that AC Delco batteries are subpar because they use recycled materials. A listener corrects this, pointing out that nearly all modern batteries are made with recycled components—a standard, environmentally responsible practice. Ron emphasizes the importance of proper diagnostics before replacing a battery.

Later, CRC’s Scott Brownstein joins to discuss brake maintenance. He stresses the importance of cleanliness, proper "bedding in" of new pads and rotors, and using non-chlorinated brake cleaner. Using the wrong products, like carburetor cleaner, can compromise safety.

Ron’s theme throughout: diagnose properly, use the right tools, and don’t cut corners.

Visit us at https://www.cardoctorshow.com

• Check out our Web Site for T-Shirts & Clothing!
• Follow Us On Instagram  -   @ronananian   
• Visit our You Tube Channel for auto repair tips and videos 
• Call Into The Car Doctor Hotline 24/7 (855)560-9900   
• Live Call In Show Saturdays 2-4PM Eastern Time 

  Visit us at https://www.cardoctorshow.com

See omnystudio.com/listener for privacy information.

Visit us at https://www.cardoctorshow.com

• Check out our Web Site for T-Shirts & Clothing!
• Follow Us On Instagram  -   @ronananian   
• Visit our You Tube Channel for auto repair tips and videos 
• Call Into The Car Doctor Hotline 24/7 (855)560-9900   
• Live Call In Show Saturdays 2-4PM Eastern Time 

  Visit us at https://www.cardoctorshow.com

See omnystudio.com/listener for privacy information.

🚘 Today on Ron Ananian: The Car Doctor 🔧
Ron tackled myths, misdiagnoses, and the real science of fixing cars:

🔋 Battery Confusion – Cold = weak battery? Yes. But replacing it every 3–4 years “just because” is fear, not fact.
🚗 Toyota Knock – V6 top-end noise? Start simple: belt off, check VVT, use your ears before your wrench.
🛠️ Hyundai Headache – 1 year, $3.5K in parts, still no fix. Might not be the engine—could be the trans starting in 2nd gear.
🧠 The real fix? Science, logic, testing—not guessing.

🗣️ “Cars are physics, math, science. Fix them with facts—not fear.”

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🚗💬 This week on Ron Ananian: The Car Doctor 🔧
Ron tackled what really matters in car repair: honesty, method, and smart business.

🛑 "Reasonable Repair" – Don’t throw money at rust buckets. Ron helped a customer with a 17-year-old Mitsubishi realize when it's time to let go—focusing on safety first, not pointless repairs.

🔍 Main Call: 1973 Opel Manta –
Paul’s classic car sputters & stalls. Ron lays out a step-by-step diagnostic plan:
✅ Spark strength
✅ Coil voltage
✅ Fuel pump vacuum test
✅ Tank restrictions
✅ Vacuum/timing check

📏 Diagnosis isn’t guesswork. It’s science + logic = results.

💡 Takeaway:
✔️ Be honest with customers
✔️ Diagnose methodically
✔️ Use slow weeks to sharpen your shop

🗣️ “No car is unfixable—only improperly diagnosed.”

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Ron Ananian, The Car Doctor shares a story about a first-time customer who brought in a 2008 Volvo with a salvage title. Shop policy required a full inspection, which the customer agreed to, but his wife was upset about the cost and disclosure. Ron stresses the importance of honesty, comparing it to telling a doctor your full medical history. The inspection revealed past rear damage, but the car was safe if properly maintained.

Later, a caller named Jim sought advice on fixing a persistent oil leak in his Cadillac Escalade. Ron suggested checking for a warped housing and cautioned against sealant on the face of the shim gasket

Another caller, Mike, recommended using a stylus for touchscreens in cold weather, which Ron agreed was practical but noted that some issues are mechanical, not just usability-related. Overall, the episode highlighted the value of transparency and careful diagnostics in car repair.

Visit us at https://www.cardoctorshow.com

• Check out our Web Site for T-Shirts & Clothing!
• Follow Us On Instagram  -   @ronananian   
• Visit our You Tube Channel for auto repair tips and videos 
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• Live Call In Show Saturdays 2-4PM Eastern Time 

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In this episode of Ron Ananian, The Car Doctor he previews a Memorial Day tradition featuring a past interview with his late Uncle Steve, a WWII pilot. He takes a call from Nancy in Wisconsin, who asks about using fuel system cleaner in her 2020 Chevy Trax. Ron approves, recommending it at every oil change or monthly as preventative care. He also advises her to check if major services like the 30,000-mile maintenance were done and to prepare for the upcoming 60,000-mile service.

He encourages staying informed and recommends resources like AutoBatteries.com and BGFindAShop.com.

Ron shares shop stories emphasizing timely oil changes and praises the new Ford Mustang GT for its performance. He invites listeners to submit old Uncle Steve interviews to build a tribute archive and reflects on his uncle’s incredible wartime journey. The episode ends with a reminder of the sacrifices made by the Greatest Generation.

Visit us at https://www.cardoctorshow.com

• Check out our Web Site for T-Shirts & Clothing!
• Follow Us On Instagram  -   @ronananian   
• Visit our You Tube Channel for auto repair tips and videos 
• Call Into The Car Doctor Hotline 24/7 (855)560-9900   
• Live Call In Show Saturdays 2-4PM Eastern Time 

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Call Of The Week - Ron Ananian, The Car Doctor

• Vehicle: 2008 Honda Ridgeline

• Issue: Blower fan and AC stop working after restarting the car (typically after refueling)

• Behavior:

•  

  No blower, no AC compressor

  • Comes back on after driving or waiting

  • Happens intermittently

Most Likely Cause:

• Blower Motor Power Transistor (Resistor Module)

  • Controls blower speed and provides ground

  • Common failure point on this vehicle

  • Failure prevents both blower and AC compressor from working 

Recommended Action:

• Replace the blower motor power transistor

  • Located under dash, by blower housing

  • Use OEM or Denso for reliability

Optional Diagnostics:

• Check for 12V at white/blue wire (blower power)

• Test blue/black wire for ground (from transistor)

• Bypass transistor ground to confirm blower motor works

Visit us at https://www.cardoctorshow.com

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• Live Call In Show Saturdays 2-4PM Eastern Time 

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