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noone 11-19-2012 07:56 PM

Pressure switch replacement on Carrier 58STA110-22
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I need to replace the pressure switch on a Carrier 58STA110-22. Is this fairly easy? Will I be able to buy this part at my local Johnstone Supply? Thanks in advance....

hvaclover 11-19-2012 08:45 PM


Did you even call the Johnstone to find out? Might have a generic but Carrier is really only the place to get them.

noone 11-20-2012 01:38 PM

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My A/C repairman just called me back and told me it was $550 for the switch. This does NOT sound right. I thought I heard these were around $50? I think I'm getting jerked around here.

yuri 11-20-2012 02:17 PM

You are. But most companies will travel to your house and install it for $200 and up and we don't care about what the consummer finds out the price is. My boss called a customer who supplied a certain product after finding out his cost on the internet. When asked if he would drop his price because we know his cost. No way in h**ll so why should we give away our services.:no:

noone 11-20-2012 02:28 PM

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Is there any way to rig it to work temporarily? Maybe blow in the tube to clear it out?

yuri 11-20-2012 03:26 PM

No, It works off vacuum. Click on pressure switches or phone them as they have most brands and switches.

noone 11-20-2012 04:25 PM

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I just ordered the switch from my local Carrier distributor for $21.

Just curious- do these switches malfunction often? The unit is only 7 years old.

Marty S. 11-20-2012 05:00 PM

Pressure switches rarely fail. Unless you measured the vacuum with a manometer to know for sure the odds are against it.

noone 11-20-2012 05:08 PM

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What is the likely culprit then? The LED light flashed in sequence 3 short and one long. I did notice that it was hard to blow into the black tube that was attached to it (I had to blow really hard for air to pass through). What is this tube connected to?

JJboy 11-20-2012 11:57 PM

By this error code the problem is in vacuum not on the pressure switch......The pressure switch doesn't fail open and close at the same time.

noone 11-21-2012 12:05 AM

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Any tips on how I can fix this myself?

JJboy 11-21-2012 12:13 AM

You need manometer to check if the inducer motor is pulling the vaccum pressure necessary to close the pressure switch....also you can check for any clogged at the exhaust. Using a multimeter you can measure if there is 24vac at the pressure switch when the tsat call for heat.....when you see the igniter glow you should get 0v at the pressure switch.

noone 11-21-2012 12:22 AM

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Thanks. The inducer motor never comes on. Is that because of the pressure switch? I'm not sure how the black vacuum tube connected to the pressure switch works and what the other end is connected to. Thanks again for the assistance!

Marty S. 11-21-2012 05:47 AM

The inducer should come on first then the pressure switch closes. No power to the inducer would be a bad control board. Yes power but the inducer doesn't run equals new inducer assembly or a bird stuck in the wheel.

noone 11-21-2012 06:12 AM

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Interesting. They just replaced the control board over this past summer. Are there any gotchas to replacing the control board? Is it possible they didn't hook up a wire to the correct place? What can I check?

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