Air conditioner temp?

[teevman]

I have an Eagle HT 23.5RBS which we just purchased. My question is about the a/c which i believe is the 13.5 unit.

Today i was testing it out and it doesn't seem to be cooling like it should. The temp outside is 82 and when i hold a thermometer up to the incoming cool air it shows around 55. Now while this may sound alright my old 1989 5th wheel showed around 43 under similar circumstances.

Has anyone else ever tested out the temp of incoming air to see how cold the temp was?

Thanks and i love reading everyone's posts on here, i've learned a lot.

[Denise]

Welcome to JOF Teevman. We upgraded to the 15k unit. We have never checked the temp, but it definitely blows cold when we need it. Glad you're learning so much here. Neat you found us

[teevman]

Thanks. We are going to take it on it's first voyage next week so it will be a good test to see how it works. Really like it so far and i'm now actually thinking the air is working as it should but wish it had the 15k as well, just takes a bit longer to cool the unit down. My next project will be to mousersize it, lol.

[teevman]

I have another question about this a/c or at least the wall thermostat.

It is a coleman-mach and i set the one side to "cool" but the other side has four settings auto,fan,low and high. What is the difference between auto and high, they both run with the fan on high so to me they seem the same.

Also sometimes if i have it running on the high setting but then switch it to auto it stops running altogether and i have to switch it back to high. Any ideas why it stops running when switched to auto?

[drfife]

If it is set to auto, the fan only runs when the compressor is running.

[Grumpy]

A good AC unit will have about a 15/20 degree temp drop across the coil. If the temp inside the trailer is 75 and the air coming out is 55/60 the unit is working properly. Out side temp will naturally make it work harder but you can't use that to measure the AC's efficiency.

[teevman]

Originally Posted by Grumpy

A good AC unit will have about a 15/20 degree temp drop across the coil. If the temp inside the trailer is 75 and the air coming out is 55/60 the unit is working properly. Out side temp will naturally make it work harder but you can't use that to measure the AC's efficiency.

I checked that out on mine later today and the difference was around 19 so i guess that means it's working as it should. Thanks.

[teevman]

Originally Posted by drfife

If it is set to auto, the fan only runs when the compressor is running.

Do you mean the fan outside because the one inside seems to run all the time either way.

[drfife]

Originally Posted by teevman

....Also sometimes if i have it running on the high setting but then switch it to auto it stops running altogether and i have to switch it back to high. Any ideas why it stops running when switched to auto?

Originally Posted by teevman

Do you mean the fan outside because the one inside seems to run all the time either way.

I do not understand your question.

What is the "outside" fan?

Inside?

Confused.....

[teevman]

Originally Posted by drfife

I do not understand your question.

What is the "outside" fan?

Inside?

Confused.....

Well i guess you answered my question with yours, lol. For some strange reason i thought there were two fans.

So the fan should only be blowing air into the trailer when the compressor kicks in with it set to auto? If that is the case then i guess i'll leave it set to high so i get the air circulation when the compressor isn't running.

[drfife]

Originally Posted by teevman

Well i guess you answered my question with yours, lol. For some strange reason i thought there were two fans.

So the fan should only be blowing air into the trailer when the compressor kicks in with it set to auto? If that is the case then i guess i'll leave it set to high so i get the air circulation when the compressor isn't running.

I was beginning to think Saskatchewan AC's were different than Texas AC's.:hihi:

We rarely run our AC on auto. During the day we run on high and at night on low.

[norty1]

If you hear the compressor running and do not hear the fan, you have a problem.

[teevman]

Originally Posted by drfife

I was beginning to think Saskatchewan AC's were different than Texas AC's.:hihi:

We rarely run our AC on auto. During the day we run on high and at night on low.

From what i've heard the only difference between the two is the ones in Texas are slightly larger. :jester:

[teevman]

Originally Posted by norty1

If you hear the compressor running and do not hear the fan, you have a problem.

When the fan is running and the compressor kicks in it's not that noticeable, at least to my ears, not like the 25yr old one i had before. When that compressor kicked in it almost made the trailer shake.

[tinlizzie23]

teevman - in answer to your second question - the various modes under cool setting work as follows:

1. AU causes the compressor to come on and the fan speed switches back and forth between hi and lo to satisfy the temp you set.
2. HI forces the use of hi fan speed only, with compressor on.
3. LO forces use of lo fan speed only, again with comp on.
4. HF uses hi speed A/C fan only, without compressor or furnace fan.
5. LF uses lo speed A/C fan only, again w/o comp or furnace fan.

Under the heat setting, it works the same, except BTU valve instead of compressor, and use of the furnace fan instead of the A/C fan. It's possible that you might not have all these modes, depending on model, but most units have them, as far as I know.

Hope this helps.