York Heat Pump Info Needed

[clog...@yahoo.com]

Hello,

I have been working with a friend of mine (who used to do HVAC repair about
15 years ago, and is without internet access) to try and fix a problem with
his York heat pump. We have reached the point where we have eliminated
everything but the logic board in the heat pump and need to know where we can
go from here.

First off, the unit is a York CHP030-6A, which came with his house about 18
years ago. Since the unit is near/at/past its expected life, he doesn't want
to invest a lot of money in repairs at this time. He'd like to just extend
its life a little longer to prepare for the cost of a complete replacement.

Here is a rundown of what has happened. About a week ago, the unit stopped
working and the emergency heat light came on (without emergency heat
running). From what I gather, this is a trouble light. He first checked all
breakers, fuses and the 24v line is good all the way to the logic board. He
tested all of the individual relays and everything tests out fine. When he
pulled the logic board out however, he found a dead mouse under it that
apparently shorted out the 24v input to the big 5w resistor on the board.
(Small burned spot on the board.)

Since it looks like the logic board was the only thing damaged, he got a
quote from the local York dealer for a replacement for $200. What we'd like
to try first however, is to see if we can repair the board. I do electronics
repair on the side and the board looks fairly straight forward.
Unfortunately, we do not have the schematics for the board, so it is taking a
LONG time to try and trace everything out. My questions are: Are the
schematics for this board available anywhere and if we aren't able to repair
the board, what is the possiblity of locating a used replacement?

Thanks,
-Chris

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[Buck153]

In article <7db2rc$a8e$1...@nnrp1.dejanews.com>, clog...@yahoo.com writes:

>Hello,
>
> I have been working with a friend of mine (who used to do HVAC repair about
>15 years ago, and is without internet access) to try and fix a problem with
>his York heat pump. We have reached the point where we have eliminated
>everything but the logic board in the heat pump and need to know where we can
>go from here.

ARE you for real, if he's been in the business he needs to ask where to go?

> First off, the unit is a York CHP030-6A, which came with his house about 18
>years ago. Since the unit is near/at/past its expected life, he doesn't want
>to invest a lot of money in repairs at this time. He'd like to just extend
>its life a little longer to prepare for the cost of a complete replacement.

A little longer is what many customers want, but hey when it dies....

> Here is a rundown of what has happened. About a week ago, the unit stopped
>working and the emergency heat light came on (without emergency heat
>running). From what I gather, this is a trouble light. He first
checked all
>breakers, fuses and the 24v line is good all the way to the logic board. He
>tested all of the individual relays and everything tests out fine. When he
>pulled the logic board out however, he found a dead mouse under it that
>apparently shorted out the 24v input to the big 5w resistor on the board.
>(Small burned spot on the board.)

Emergency lite comes on only when switched at stat, unless somekind of short.
But then again a man formally in the trade, who has lived in the house for a
number of years, isn't aware of this. I don't think anyone could explain it to
him.

> Since it looks like the logic board was the only thing damaged, he got a
>quote from the local York dealer for a replacement for $200. What we'd like
>to try first however, is to see if we can repair the board. I do electronics
>repair on the side and the board looks fairly straight forward.
>Unfortunately, we do not have the schematics for the board, so it is taking a
>LONG time to try and trace everything out. My questions are: Are the
>schematics for this board available anywhere and if we aren't able to repair
>the board, what is the possiblity of locating a used replacement?

While you may able to mess with this board, without the specs you wouldn't know
if the components you changed would have the correct tolerances. The internal
schematics usually aren't available. It's possible to get a used board, but
highly unlikely. If your that good why don't you just use your time more
wisely, doing something you'll get paid. Since he's a dear friend give him the
money, to have his unit fixed. Same difference isn't it?

Buck

[Craig]

Chris
No internal scematics are available. Buy a new board or a new unit and
hope thats your problem.
Craig
UA local 9

clog...@yahoo.com wrote:
>
> Hello,
>
> I have been working with a friend of mine (who used to do HVAC repair about
> 15 years ago, and is without internet access) to try and fix a problem with
> his York heat pump. We have reached the point where we have eliminated
> everything but the logic board in the heat pump and need to know where we can
> go from here.
>

> First off, the unit is a York CHP030-6A, which came with his house about 18
> years ago. Since the unit is near/at/past its expected life, he doesn't want
> to invest a lot of money in repairs at this time. He'd like to just extend
> its life a little longer to prepare for the cost of a complete replacement.
>

> Here is a rundown of what has happened. About a week ago, the unit stopped
> working and the emergency heat light came on (without emergency heat
> running). From what I gather, this is a trouble light. He first checked all
> breakers, fuses and the 24v line is good all the way to the logic board. He
> tested all of the individual relays and everything tests out fine. When he
> pulled the logic board out however, he found a dead mouse under it that
> apparently shorted out the 24v input to the big 5w resistor on the board.
> (Small burned spot on the board.)
>

> Since it looks like the logic board was the only thing damaged, he got a
> quote from the local York dealer for a replacement for $200. What we'd like
> to try first however, is to see if we can repair the board. I do electronics
> repair on the side and the board looks fairly straight forward.
> Unfortunately, we do not have the schematics for the board, so it is taking a
> LONG time to try and trace everything out. My questions are: Are the
> schematics for this board available anywhere and if we aren't able to repair
> the board, what is the possiblity of locating a used replacement?
>

[TReeves717]

Yorks do lockout leaving the EM light on.Which indicates a fault.Meaning sensor
failure,2defrost in 1hr.No defrost,low refrigerant charge.You must reset 24vac
to board and check listed fault failures.This circuit boards resistor commonly
looks burn't due to the heat.You may want to have a York dealer look at it or
contact York.Good luck

[paul g]

check across pins 9 & 10 on the terminal connector for voltage while power
applied & tstat is calling. if you are reading anything other than 0 or 24
volts your time delay circuit is gone. you can bypass this but it will
effectively eliminate your lock out high discharge safety circuit.
Paul G.

[Craig Mims]

It,s time to get a new unit.
<clog...@yahoo.com> wrote in message
news:7db2rc$a8e$1...@nnrp1.dejanews.com...

[Mike&Bobbi Lee]

What... Only $200.00!?, Is that with or without labor, in any case, that
price is not that bad of a deal. If your friend was in the HVAC
business before he should be able to find that board and maybe at
cost....
Mike R.C.R.S
CA