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Old 01-04-2012, 08:44 AM   #1
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VisionPRO Th8000 series Tstat


Hello:
When I have this tstat on cooling, I need to set the temp display offset (code 0700) at -1 or -2 or the unit never shuts off, just keeps running.
Now in heating season, that setting also never lets the unit shut off , so I need to reset it back to 0, meaning normal temp is displayed with no offset. Then it seems to shut off as it should.
Question: is there something else wrong here that I need to have these different settings for heat and cool ? Or a setting that will function both modes properly ?
The HVAC is a Goodman AEPF 313716AA air handler, and DSZ180361A compressor, 3 ton HP.
Thanks for your help, and Happy 2012 to all of you !

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Old 01-04-2012, 11:45 AM   #2
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if the stat is put in AUTO/system setting it will swing between both settings but one checks the other on that heat setting and cooling temps set or just set system to HEAT and that locks the cooling out for the winter...basically you can't set heat for 68F and cooling for 68F there is built in range between them set the cooling up high and or lock it out with HEAT system setting..FAN/auto

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Old 01-04-2012, 12:14 PM   #3
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VisionPRO Th8000 series Tstat


Thanks for the reply, but I guess I was not clear...I have no problem manually switching between heat and cool, or could even set it for auto as you say, but the problem for me is the temp settings.

If I set the displayed temp mode at 0, meaning it is displaying the true temp, then it works fine for heat, but in cooling mode, a/c will not shut down...I have to set the displayed temp at 1 degree or more BELOW actual temp to get the tstat to be 'satisfied" and shut off the compressor, ie, it reads 70 degrees at tstat, but is actually 69 degrees (one degree below actual), then it will shut down, If I leave it set at actual temp, as for heat mode, so it displays the actual temp of 70 degrees, then it will never get "satisfied" and will not stop compressor even tho the set temp and attained temp both read 70 degrees. Hope this makes some sense to you.
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Old 01-04-2012, 10:19 PM   #4
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VisionPRO Th8000 series Tstat


even though they both read the same they are still up to .5 degrees off. That stat and most new thermostat hold a tight threshold of .5 F or less. SO when you have cooling set at 70 and the stat reads that the indoor temp is 70 it may actually be 69.5 This is normal. Let the stat do what it does it will be fine.
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Old 01-05-2012, 04:24 AM   #5
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Thats a 2 stage heat pump. So its probably running in first stage most of the time. Like it should. What are the CPH settings for first and second stage compressor.
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Old 01-05-2012, 07:44 AM   #6
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Its funny you should ask that...the codes for those 2 readings are 0240 and 0260, and as I scroll thru the settings, those 2 are NOT listed....it skips from 0230 right to 0260, and 0260 per the setup manual is the third stage cph set at 9 for electric furnace. I'm sure the 1st and 2nd stages are really there, just don't know where they might be displayed. Some tech I am lol.
Anyway, I do have the temp display offset set back at default, or 0 offset. Works fine for heat, so the problem is the cooling mode. When I switch back to cooling this spring, if it still won't shut off at zero offset, I'll change it back to -1 again since that works.
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Old 01-05-2012, 08:06 AM   #7
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0170 is probably not set correctly then. And you may only be running in first stage.
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Old 01-05-2012, 08:21 AM   #8
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I just now checked 170 and its set (by the installer) at 12 - 3 heat/2 cool heat pump with aux heat...maybe this config doesnt display heat stage 1 & 2 ? And I think there are at least 2 stages as it runs slowly then will pick up steam and run faster.
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Old 01-05-2012, 02:05 PM   #9
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It may not display which stag its on.

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