Search: Posts Made By: dsomerv
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05-04-19, 09:10 AM
Replies: 4
Views: 399
Posted By dsomerv

The communicating interface is likely 4 wires: 2...

The communicating interface is likely 4 wires: 2 for signaling ( probably using the RS423 standard), 2 for 24V power to the defrost control board - if so, there'll be a 4pin connector on the control...
02-15-19, 08:42 AM
Replies: 9
Views: 341
Posted By dsomerv

You might check the thermostat to see what the...

You might check the thermostat to see what the temperature differential from off to on is and try a smaller difference. For example if the current difference is 2 degrees F, try 1.5 or 1 so that...
02-09-19, 10:12 AM
Replies: 9
Views: 341
Posted By dsomerv

If the existing thermostat is nothing special,...

If the existing thermostat is nothing special, you could replace it with one that has the periodic blower activation feature … or you could connect such a thermostat in parallel with the existing...
02-05-19, 11:16 AM
Replies: 9
Views: 401
Posted By dsomerv

-can you measure the voltage on the Y terminal of...

-can you measure the voltage on the Y terminal of the control board in the outdoor unit ?
- have you made any recent changes to the system (e,g, new thermostat)
- do you know the manufacturer and...
11-30-18, 02:10 PM
Replies: 5
Views: 397
Posted By dsomerv

Interesting thanks. You don't mention...

Interesting thanks.

You don't mention comfort ; at my house we lower the temperature 5 F (~2.5C) mainly because it's more to our liking to sleep in cool air, and don't mind paying for any...
08-06-18, 06:13 AM
Replies: 10
Views: 445
Posted By dsomerv

You could try jumping / bypassing the breaker to...

You could try jumping / bypassing the breaker to confirm that the breaker has failed ...
07-14-18, 03:45 AM
Replies: 3
Views: 392
Posted By dsomerv

when maintenance exceeds depreciation - replace

when maintenance exceeds depreciation - replace
06-22-18, 05:42 AM
Replies: 7
Views: 1,443
Posted By dsomerv

either the shutoff is due to real high pressure...

either the shutoff is due to real high pressure or bogus signal - some thoughts for troubleshooting:

- did you measure the pressure when the event occurs and know for sure that it is a high...
06-19-18, 08:01 AM
Replies: 14
Views: 762
Posted By dsomerv

If there's no Y1 at the outdoor unit then there...

If there's no Y1 at the outdoor unit then there should be no Outdoor fan/condenser running.
Is the contactor closed ? If not - yikes ?
If so, is the contactor being activated by the 24v wire...
06-19-18, 06:42 AM
Replies: 7
Views: 1,443
Posted By dsomerv

A few years ago I had a similar problem and it...

A few years ago I had a similar problem and it turned out to be the high pressure switch - specifically where the wire is connected right at the switch .
It was a broken wire which was connected...
06-16-18, 01:25 PM
Replies: 14
Views: 762
Posted By dsomerv

it sure sounds like a bad or mis-wired...

it sure sounds like a bad or mis-wired thermostat.
Have you or can you measure the voltages on the control wires at the outdoor unit and indoor unit when the misbehavior is happening.
04-12-18, 08:26 AM
Replies: 4
Views: 575
Posted By dsomerv

It depends ... If your environment offers clean...

It depends ...
If your environment offers clean air, the outside unit won't need periodic attention, and just an annual inside filter change;
On the other hand if you live where there's smog and...
04-10-18, 08:42 AM
Replies: 24
Views: 1,703
Posted By dsomerv

It seems clear that your heat pump is not , well,...

It seems clear that your heat pump is not , well, pumping enough heat. Whether you want to attribute the system ability to maintain but not reach set point to AUX is up to you, but it'd be easy to...
04-08-18, 07:41 AM
Replies: 24
Views: 1,703
Posted By dsomerv

AUX iliary heat is just that - it augments the...

AUX iliary heat is just that - it augments the heat pump when the heat pump alone, after running for a 'while' fails to meet setpoint or when the temperature difference between ambient and setpoint...
04-07-18, 10:17 AM
Replies: 24
Views: 1,703
Posted By dsomerv

Here's a scenario that could explain the...

Here's a scenario that could explain the symptoms:
-heat pump runs but doesn't satisfy the set point after 30 minutes (say)
- thermostat activates AUX heat because of the elapsed time or when...
03-07-18, 05:34 AM
Replies: 35
Views: 1,820
Posted By dsomerv

sweet ... ...

sweet ... .
03-05-18, 10:47 AM
Replies: 35
Views: 1,820
Posted By dsomerv

Well done ! Out of curiosity: - how was the...

Well done !
Out of curiosity:
- how was the panel removal experience ?
- were there any clues about how the thermistor failed ?
03-01-18, 07:02 AM
Replies: 35
Views: 1,820
Posted By dsomerv

Sounds right to me ... proceed firmly but gently...

Sounds right to me ... proceed firmly but gently ;-)

Pages 6,7 of this: http://www.upgnet.com/PdfFileRedirect/035-19986-001-A-0204.pdf describe the defrost operation for a different York board but...
02-28-18, 10:04 AM
Replies: 35
Views: 1,820
Posted By dsomerv

You'd think that the panel is made to be removed...

You'd think that the panel is made to be removed - if not, why the mounting screws? - and it covers important parts needing service eventually ...

The tubing doesn't appear to have much "loose"...
02-28-18, 07:16 AM
Replies: 35
Views: 1,820
Posted By dsomerv

If the coil thermistor S1-03101276000 is indeed...

If the coil thermistor S1-03101276000 is indeed a 10k (which I'd bet) the 3k ohm reading would sure explain the problem ... and a replacement seems inexpensive enough, e.g....
02-27-18, 06:54 AM
Replies: 35
Views: 1,820
Posted By dsomerv

1) also check that the ambient thermistor is...

1) also check that the ambient thermistor is properly located lest it be sitting somewhere that's always warm
2) I had my thinking exactly backwards when I said, somewhere above, that an open...
02-26-18, 07:10 AM
Replies: 35
Views: 1,820
Posted By dsomerv

1) is this what your hp looks like :...

1) is this what your hp looks like : http://www.upgnet.com/PdfFileRedirect/035-21223-001-F-0409.pdf ?
if so....
2) Did you measure the resistance across coil-coilg wires ?
3) do the coil wires...
02-24-18, 07:07 AM
Replies: 35
Views: 1,820
Posted By dsomerv

If you try test mode, make sure you know how to...

If you try test mode, make sure you know how to shut the unit down immediately if the unit fails to leave defrost mode - e.g. disconnect near the unit.
If possible you should also observe the...
02-23-18, 06:48 AM
Replies: 35
Views: 1,820
Posted By dsomerv

The essence of your problem is failure to...

The essence of your problem is failure to defrost. I'd guess that this board is for demand defrost : which is supposed to mean defrost only when necessary. If so, read on...
The decision about...
02-22-18, 10:55 AM
Replies: 35
Views: 1,820
Posted By dsomerv

See: ...

See:
http://www.upgnet.com/PdfFileRedirect/035-21270-001-B-0510.pdf

I'd check for reversing output in Test after making sure that all sensors are connected, and not afflicted with broken (=open)...
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