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Billy_1948 01-08-2008 07:21 PM

Need advice on compressor
 
I have a Rheem 2ton heat pump for my upstairs and I noticed a noise coming from the outside unit about 2 weeks ago. The heat was working, but the noise was getting worst. It wasn't like a really bad noise, but I know it was something I haven't heard before, and I had these units installed in 1994. I have a 5 ton heat pump for down stairs. This past monday, it got hot here in Louisiana, so I put the air on. It wasn't blowing cool air, so I called a repairman to come take a look. He checked the unit outside, and told me the compressor had to be replaced. He stated it would be just as cheep to go ahead and replace the intire outside unit. He then stated that I most likely would have to replace the inside unit as well because he couldn't put anything less than a 13 seer unit outside and Mine was a 12 seer, and the outside might not match up with the inside.. I don't know much about this, but I would hope I could replace the outside unit without replacing the intire unit. Can anyone advise me on this.
Thanks,
Billy

biggles 01-08-2008 09:36 PM

on the 2 ton it might be just the condenser fan bearing..shut the disconnect at the condenser and spin the blade if it stops hard and doesn't free wheel that could heat up during a run and produce the noise yo hearing.the compressor can be changed out without anything else being touched...even the freon he should pull the freon change the compressor and recharge it with the same gas..if he tries to bill you for new gas the only reason would be because it was burnt from the compressor failure...if it was a mechanical failure the same gas goes in and make sure he includes a liquid line dryer if it WAS a burnout and a new contactor for the compressor.if your condensers aren't rusted on the bases and the coils are desent and you keep the inside clean of leaves and dirt you can hang on to them.call others for a compressor changeout price only see what they say...if te motor on the 2 ton is tight when you spin it some oil and or WD-40 sprayed down the shaft will help with the noise if that was the source!:eek:

Billy_1948 01-08-2008 11:30 PM

Thanks, I'll look at that first thing tomorrow. The guy is suppose to be going back to his shop and look up all the numbers and then he will tell me what he has to do. I just had a serious problem with him telling me he had to change out the conplete unit because the compressor was bad.
Thanks again for the quick response. I'll keep you posted on this.

biggles 01-09-2008 05:20 AM

shops in the residential market drill their people to go for a complete condenser/system changes because it is a "quick day of work with big numbers"..techs get buggy and want to go for the whole system and there your talking an outside section vs and indoor air handler.if the condenser was tilted with a grinding condenser fan motor and that burn compressor sure i would suggest a new condenser...you would be putting in almost 75% new stuff in an aged unit...unless you flood out in the basement or god forbid you have a fire in or around the fan section nobody should suggest the whole system...NOTE to keep in mind the freons are changing as the years go on you are most likely R-22 make sure he stays with that and corners you into a freon update then he might push for a new air handler due to a metering device for the freon to match the change to a newer TYPE of freon...and the FREON in your system is like air in a tire....once it is in you don't have to constantly add to it if you never had anybody add freon since the 94' install that is considered a tight system.

Billy_1948 01-09-2008 11:04 AM

Thanks, I pulled my paper work on my unit's, and you are correct. It does have R-22 freon. The information you have given me has helped alot. If this guy keeps insisting on putting in a conplete unit, I'll get another dealer to look at it. They are suppose to call me today, and if they do I''l let you know what they say.
Again, Thanks for the help

hvac122 01-09-2008 11:45 AM

I would not waste money putting a compressor in a 14 year old low efficiency unit. It has given you good life to now. Also don't use WD-40 on a fan. It will hurrt the bearings more than help and either way is just a temporary fix.

If you do change the unit then a new indoor coil would be needed to get the greater efficiency.

When we change a compressor we always put in virgin refrigerant as we have no idea what may have gotten into the old when the pump went bad.

bigMikeB 01-09-2008 05:19 PM

Quote:

Originally Posted by hvac122 (Post 86996)
I would not waste money putting a compressor in a 14 year old low efficiency unit. It has given you good life to now. Also don't use WD-40 on a fan. It will hurrt the bearings more than help and either way is just a temporary fix.

If you do change the unit then a new indoor coil would be needed to get the greater efficiency.

When we change a compressor we always put in virgin refrigerant as we have no idea what may have gotten into the old when the pump went bad.


I'm with you on this one 100%.

Billy_1948 01-09-2008 09:28 PM

I was going to replace the conplete outside unit. I wasn't going to replace the compressor alone. The guy told me I he would have to change the inside unit also. Are you saying you would change the conplete inside unit or just the coil on the inside. The guy called me back and told me it would cost $3700.00 to replace both outside and inside units. This would be for a 2 ton trane, not rheem.

Billy_1948 01-09-2008 09:32 PM

If I decide to replace both the inside and outside units, does anyone have any suggestions on what brand would be the best to go with?

hvac122 01-10-2008 07:04 AM

Yes you would need to change the outdoor unit and at least the indoor coil. The system needs to be matched in order to get the right efficiency. Make sure that they show you the model numbers and the ARI match for the models they are using.

There are many options around now for higher efficiencys and better comfort. I would get at least 3 quotes so you can compare.

The brand of the system dosn't matter near as much as how well it is installed. Do some research and hire a great installation company and you will be happy with whatever they install.

Good luck and get it in writing whatever you do.:)

biggles 01-10-2008 07:40 AM

have who ever does the entire change out throw in a new thermostat Honeywell Vision Pro 8000 for FREEEEEE :whistling2: to get the job they might go for it.

Billy_1948 01-11-2008 06:11 AM

I have contacted 3 other companies that are suppose to be very good, and they will be coming out and check my units, and give me a price on replacing them.
Thanks to all of you who responded to my help request. I come to DYI at least 2 or 3 times a week to check out all the post and I have learned so much on here. I only have had to request help a couple of times for different reasons, and the reponses have been great.
Thanks again.


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