DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > Repair or replace HVAC?

Thread Tools Search this Thread Display Modes
Old 09-24-2007, 03:12 PM  
Junior Member
Join Date: Sep 2007
Posts: 5
Default Repair or replace HVAC?

I have a Carrier Super Saver / Lennox furnace and central AC unit, and they seem to date back to '83 or so (Carrier S/N is U3C31187). We just had our first problem ... the AC drain clogged and so the drip tray overflowed.

I blew out the drain line, so the system is running again. The water on the basement floor is no big deal, but it seems that some also dripped into the blower. It's not as balanced as it used to be. It's not shaking out of the mountings, but it's going to need to be repaired or replaced so that we don't lose it this winter.

While exploring the leak, I found corrosion in the drip pan. The fill valve on the condensor is broken (closed) so I can't add more R-22 without opening the system. But, it's cooling OK and not freezing the coils. So, I could replace the blower motor and fan, and I could replace the drip tray. What are some other things I should look for in the repair-or-replace quest?

What might I expect to pay for a new furnace and AC, installed? My heating and cooling bills have been reasonable - I might be able to save $50/month, so that alone isn't a selling point.

Thanks in advance for your great advice,

Glenn Liston

gwliston is offline  
Reply With Quote
Old 09-25-2007, 10:22 PM  
Senior Member
Join Date: Mar 2006
Posts: 2,990
Liked 3 Times on 3 Posts

Send a message via AIM to glennjanie

Welcome to the forum, Glenn Liston:
Your problems are minor and worth the repair. The refrigerant doesn't wear out or burn up; it only leaks out. A/C pros have a saying, "Clean first, gas last". If your evaporator and condenser coils have not been cleaned in a year or more, that should be your first step. You'll be surprised at the efficiency you will gain!
The squirrel cage is probably still in good balance; the blower motor is just getting loose in the bearings. The drain line needs a running trap in it to discourage bugs from plugging it up.
If these repairs get you another year or two from the systme, you can say you did well and saved or deffered a lot of expense. Systmes are designed to last 12 to 20 years and you have beat that.

glennjanie is offline  
Reply With Quote
Old 09-26-2007, 07:52 AM  
Junior Member
Join Date: Sep 2007
Posts: 5

Originally Posted by glennjanie View Post
Welcome to the forum, Glenn Liston:
If your evaporator and condenser coils have not been cleaned in a year or more, that should be your first step. You'll be surprised at the efficiency you will gain!

Thanks, Glenn.

I took some photos around the inside (easier than climbing inside, harder to forget what I saw). There's some surface corrosion on the heat exchanger - doesn't look like any perforations yet. There is a fair amount of dust on the evaporator, so it looks like some cleaning is in order.

Unfortunately, the evaporator drip tray is showing some rust-through. So, while it may be OK for now (cooling season is ending), It's probably not going to make it through another summer.

'nuther Glenn
HPIM0243 small.JPG   HPIM0254 small.JPG   HPIM0259 small.JPG  
gwliston is offline  
Reply With Quote
Old 11-06-2007, 12:16 AM  
Junior Member
Join Date: Nov 2007
Posts: 6

Shoot mine looked like that years ago, they just get to chugging a little more and they make some mildly disturbing noises and all but beyond that they keep on getting it, I'd have to guess it's been at least 2 years since the last service on mine.

My attitude is if it ain't broke don't fix it, and on that same note I run'em till the wheels fall off.
So long it doesn't require kicking, it's fine, gtg.

Oh I mean, by all means do start putting the money aside now.
You've got some advance notice, I would start saving enough so you don't have to finance this.

And I would be for having it serviced, that is, unless you have an air pump, this forum gives me some ideas on what to do on mine tomorrow, might take the electric bill total back under 900 a year, it jumped to almost 1,000 for the year...

Last edited by 8307c4; 11-06-2007 at 12:23 AM.
8307c4 is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Rotten Wood on Casement Window - Repair or Replace? bosstone75 Windows and Doors 7 02-02-2009 09:29 AM
Repair or replace cracked original garage slab ofsoundmind Bricks, Masonry and Concrete 1 09-09-2008 05:58 AM
repair or replace? cibula11 Windows and Doors 3 04-21-2008 10:39 AM
Flat roof leaking - repair? replace? rlarkin70 Roofing and Siding 4 06-07-2007 05:53 PM
porch- replace vs repair normlynn General Home Improvement Discussion 7 11-26-2006 06:16 PM

Newest Threads