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Old 08-24-2015, 11:01 AM   #1
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A/C Relay

We have a Four Winds that the A/C stopped running. A friend found that a relay has stopped working but it is hardwired to the board (part # RVRB 7330A321) Is there a known source for a replacement? Any advise?
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Old 08-24-2015, 11:06 AM   #2
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Grab a flashlight and magnifying glass to see if there are some numbers on the relay.
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Old 08-24-2015, 11:28 AM   #3
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Myron, my first time in the forum - thanks the relay is a Potter and Bromfield T91S1D22-12 30 amp. Perhaps I could unsolder it and replace it.
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Old 08-24-2015, 11:39 AM   #4
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Quote:
Originally Posted by clarkb45 View Post
Myron, my first time in the forum - thanks the relay is a Potter and Bromfield T91S1D22-12 30 amp. Perhaps I could unsolder it and replace it.

I took a quick look at the part and it should be easy to change. If you have any experience at soldering here is how I usually pull relays out.

Clamp the board in a vice very gently or have someone hold it. You need two four hands for this.

Puddle some solder over the contacts as you gently rock the relay. One pin may release a tiny bit and then solidify quickly. Just try to run the heat around until you manage to get it to wiggle out. Grab some old lamp wire or any stranded wire and heat the solder and stranded wire flattened out a bit. It will suck the excess solder.

If you can remove the board and hold it in your hand, just heat the solder and shake the excess off by tapping the board. Make sure you give it a good shake. You don't want the solder to slide over to other places.

As a technician wearing levis I would actually slap the board on my leg. Plenty of cushion and the solder comes off the levis just fine. Don't do this with nylon pants.

If you end up with some plugged holes, grab a pin or needle, heat the hole and shove the pin into the hole. Let it cool a couple of seconds. Even if the holes appeared to come out clean inserting a needle or "dental pick" will open the hole for the new part.
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Old 08-25-2015, 09:37 PM   #5
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solder tips

Thanks for the advise.
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Old 08-26-2015, 08:13 AM   #6
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I use compressed air to blow the solider away. Wear safety glasses when doing so. Never have a problem with it sticking to anything. Quick easy and very little clean up.
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