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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by users over the course of many years.
If you have any questions, please feel free to email us.



Lincoln - Mercury
  Jim Grant's Tech Tips

'91 Honda, A/C Flooding and Rat's Nest

Q: I've had my ‘91 Honda in five times since they replaced the evaporator/compressor because the water is draining INSIDE the car. Not once after it left their hands has it drained outside the car. And, yet, I've had the car for ten years and it always drained outside--until April. They keep telling me it's a rat building a nest inside--maybe once I'd believe that but not over and over--I drive almost 1000 mi. a week (and did for three years before this with no drainage problem). Is there another reason why it's not draining correctly? Is there a hose not connected properly or could something be misaligned? This is getting to be absurd.

A: A rodent assaulting a vehicle’s ventilation system can be disastrous. One of our customers, Laurie, had a family of rodents who decided to store their winter nut supply in the heater of her Toyota. I’m not talking a nut or two here, the heater and duct work were loaded. She drives her vehicle daily. What happens three days later? The advanced planning team of the rodents noted the missing supplies and restocked the Toyota! Now Laurie is short of flipping. Who can blame her? When you’ve got rodents that are big enough to be hauling all those nuts into a car over night, you have to be concerned. More than once Laurie made it clear, she doesn’t like rodent type things. Add the fact that they are getting into her car, you now have the recipe for a very demanding solution, NOW! My first suggestion was to cut back on the cat feed. Why do cats have sharp teeth and claws? Well, it’s not to eat the fish paste out of a can. "My cats are inside cats," was Laurie’s reply. How about night vision or infrared goggles? I made a few other suggestions of some cool equipment, but Laurie was not impressed. The solution was simply parking the car in a different spot in the drive. The A/C drain in your vehicle must work or there will be problems. If you do not believe the shop performing the repairs is doing their job then go to a different shop! If you have a rodent rebuilding in your heating system, the problem has to be addressed! Rodent droppings can contain a very nasty virus. You do not want the ventilation system in your vehicle blowing this virus in your face. If rodents are calling your vehicle home, then you have do whatever is needed to evict them. May I suggest some night vision or infrared goggles?

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