ReplyMaybe the TXV is flooding out the compressor.It's a rheem, correct?
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Must be next to the beach where there are sand dunes half a block inland or so. Very few "hills" in Florida. Thank you very muchOriginally Posted by truck12
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Maybe the TXV is flooding out the compressor.It's a rheem, correct?
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Straight cool system with electric heat is cooling and heating at the same time in the weee hours of the morning? Maybe exposed low voltage leads that get water on them at that particular time? Maybe morning dew. I dunno.. that's a weird one
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I had one like this before. Customer (maintenace man)thought there was a time clock hidden somewhere in the ceiling that was turning on the unit at 10 am like clockwork everyday. I found a loose low voltage connection and haven't been back. I know the guy personally. So, i know it's fixed!! By the way it was a rheem package unit that used a wirenut without a threaded metal insert.
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It can be configured for that but it's not. The first t-stat wasn't either.
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Sounds like he needs a new low voltage wire. There is a device in the cond unit that was added. It's a black plastic box and a transformer. Forgot what it's called.
It's used on systems that don't have enough conductors going out and this makes it work. I was told this by one of our guys. I've never used one, I've always found a way to get the right wire run. This thing has 20 wire nuts on the low voltage alone.
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yeah i just think its been operator error..sounds like the temp might just be dipping a lil lower than the tstat so the heats comin on to satisfy
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...and I'm guessing the stat isn't set up for humidity control??
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It's set up as basic as it gets, he didn't even want the clock on the display.
It's not set up for auto changeover.
It's not set up for humidity control.
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... just an outside thought ...
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Do you have any data logging equipment? I would set up current sensing relays on the condensing unit and a temp sensor at one of the grills, the t-stat and the return. Than you would know if the thing is even running, calling.
Sounds like this guy might be losing his mind. Why always at 2am-5am? Who knows he could be sleep walking and touching his t-stat.
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When does the sprinkler run? If you have sprinkler system that is spraying right onto the coil it could cool it down enough to lower the head down to where there is little presure drop across the expansion device, then after the sprinkler shuts off and it dries out it starts to work agian. I ran into this once with a walking sprinkler.
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The cond unit has current sensing abilities on the comp and fan. I set a code on one by connecting a widowmaker on the line side to power a vacuum. The code read inconsistant line voltage. This guy hasn't had a code recently, the first time I went it did have a code 33, short cycling. It has a time delay built into the t-stat so I can't see him causing that. Unless he was playing with the float switch.
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Good point. I'll check to see if he has one.
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So its not a heatpump, but you have 20 wire nuts for low voltage? Thats a new one on me.
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Thats new to you?
Ok I'll admit I didn't count them. It's a four wire cond unit, theres a splice in the line chase, thats eight. Following me so far?
Then you've got the four from outside at the a/h and five from the thermostat, and one for the float switch.
That should be 14 at least, in theory, but I didn't count them.
My guess off the top of my head was six off.
What don't you get about that?
Work in this trade a few more years, you're going to find odd stuff thats not correct but works. Someday situations like this will no longer be NEW to you.
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Ok I read your 'about me' 1st year hvac apprentice at on-line school called hvac/redu.net
That explains that.
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Has an energy saving outdoor tstat thats not wired right. Its connected to the fan, thats why the condensor stays running. LOL
I'll be there when I get there and not a minute later
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Yea, that and the paint color is wrong, doesn't match the house.
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Didnt mean to sound offensive. With float switch in pan and condensate pump float switch you are looking at 3 wire nuts, 24 volts hot from transformer to one side of switch(1),other side of that switch to second switch(2), through second switch to t-stat(3), then all you got is compressor(4), heat(5),fan(6), and common(7), so depending on whatever else you have going on it shouldn't be much more than that. Even with the fact that older people are more sensitive to temperature swings, it is still hard to imagine that someone is noticing a difference early in the morning, summertime, when the temp difference between inside and outside is minimal. He says the air feels warm at this time. There is no way the t-stat will let you make a w and y signal at the sametime, so I would think you can rule out the compressor and electric heat running at the same time. It sounds to me like the stat is satisfying and fan relay is sticking or he has fan setting to on. Only been doing service work for short period of time but these kind of problems are the worst to try and deal with because you obviously can't be there to witness the situation.
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