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Q: how much will it cost to fix expantion valve for a/c? on 2001 Toyota Sequoia

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including labors and the part, i like to know how much I should expect to get it fixed.
Always get a second opinion, but it really could be that high. Depending on your location (hourly labor charges vary) the labor could be something like $65 and hour. On many cars this valve is located in the dashboard, in a box, connected to the a/c cooling lines.

So this basically means, taking the coolant out of the lines with a recovery machine, taking apart the dash (in the area around the glovebox) and taking the part out, replacement of the part, pumping the system down to a vacumn to get any air out, and then refilling the coolant.

This is a pretty intensive procedure, but I really cant figure out how the mechanic would determine that it was the expansion valve from what you wrote. If you tried a recharge kit, did you disconnect the battery for a while? There is a low pressure switch that keeps the compressor from starting, some of these have a memory. If you disconnect it the bat, and then try starting the a/c it should work for a minute, and then you might see if recharging makes a difference.

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