No Access To HVAC Evaporator Coil - HVAC - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree1Likes
Reply
 
Thread Tools Display Modes
Old 07-24-2013, 08:56 AM   #16
Newbie
 
Join Date: May 2013
Posts: 13
Rewards Points: 10
Default


Jay, how did it turn out?

I just cleaned the coil in my rental unit. Man, that was some nasty junk on the coil - about 1/8" thick and nasty. I got it off though. I also had to install a safety switch in the secondary drain, because the installer left it wide open and the tenants heard water leaking (secondary drain) from the closet where the unit is installed, plus they used 1/2" drain pipe. I took care and now the unit is good to go.

Hope all worked out for you.

Advertisement

Methodical is offline   Reply With Quote
Old 07-24-2013, 09:48 AM   #17
Member
 
Join Date: Dec 2009
Location: New Jersey
Posts: 38
Rewards Points: 35
Default


I haven't gotten around to doing it. Here in Jersey, it's been very hot lately and I didn't want to fiddle with it at the moment. Did you have access to the coil or did you have to cut it open?
jay235 is offline   Reply With Quote
Old 07-24-2013, 10:05 AM   #18
Newbie
 
Join Date: May 2013
Posts: 13
Rewards Points: 10
Default


Quote:
Originally Posted by jay235 View Post
I haven't gotten around to doing it. Here in Jersey, it's been very hot lately and I didn't want to fiddle with it at the moment. Did you have access to the coil or did you have to cut it open?
Fortunately, I had access at the front - no cutting. I can understand not screwing with things until it cools down a bit. We had that heat down here in MD, too. It's a bit cooler today. Do you plan to install the safety switch - it's an easy install (see below). Cheap insurance.

http://ows.rectorseal.com/Safe-T-Switch-SS2.php

http://ows.rectorseal.com/product-da...2/inst-SS2.PDF
Methodical is offline   Reply With Quote
 
Old 07-25-2013, 01:08 PM   #19
Member
 
Join Date: Dec 2009
Location: New Jersey
Posts: 38
Rewards Points: 35
Default


I cut out the duct today and opened up the inside of the a-coil. Not much dirt/gunk at all which was pretty surprising given the system is over 15 years old. I guess the regular change to the air filter helps. I still sprayed on the coil cleaner and then sprayed on water since I had opened it up.
jay235 is offline   Reply With Quote
Old 07-25-2013, 04:24 PM   #20
An old Tradesmen
 
Join Date: Oct 2008
Location: Somewhere
Posts: 34,599
Rewards Points: 8,184
Default


Did you cut a hole so that you are looking at the inlet or outlet side of the coil. Outlet side usually does look clean, when the inlet side is dirty.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is online now   Reply With Quote
Old 07-26-2013, 05:29 AM   #21
Member
 
Join Date: Dec 2009
Location: New Jersey
Posts: 38
Rewards Points: 35
Default


Quote:
Originally Posted by beenthere View Post
Did you cut a hole so that you are looking at the inlet or outlet side of the coil. Outlet side usually does look clean, when the inlet side is dirty.
Yes - I opened the panel so that I can also see the inside of the coils. Both sides looked pretty clean.
jay235 is offline   Reply With Quote
Old 07-26-2013, 06:57 AM   #22
An old Tradesmen
 
Join Date: Oct 2008
Location: Somewhere
Posts: 34,599
Rewards Points: 8,184
Default


Usually, when I go to all the trouble to cut open a plenum to inspect a coil. I spray it with cleaner even if it looks clean. just to make sure.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is online now   Reply With Quote
Old 07-26-2013, 12:23 PM   #23
Member
 
Join Date: Dec 2009
Location: New Jersey
Posts: 38
Rewards Points: 35
Default


Yes, completely agree with you. I did spray with the coil cleaner.
jay235 is offline   Reply With Quote
Old 06-03-2017, 09:43 AM   #24
Newbie
 
SouthLake's Avatar
 
Join Date: Jul 2012
Location: Jersey Shore
Posts: 7
Rewards Points: 14
Default

Re: No access to HVAC Evaporator Coil


I have a similar situation as OP.
this system was installed about 2 years ago before I bought the house.

One side has excellent access. front and rear def not. side facing return has okay access, not ideal. I have never had a unit where there is no panel to pop open to view the coil. this is pretty dumb design...

I would like to be able to clean this thing, and install a UV light while im there.

The sheet metal wrap around the coil appears to be attached as a "U", with the opening facing the side with all the pipes. The back of the U has about 2 inches of clearance behind it against the wall argh.

so do i just take tin snips, slice open one side of this thing (nearest the wall). that will give me access to clean the coil? then put the metal back and seal it with tape?

im afraid to go cutting this box without knowing whats on the inside of the sheet metal or the orientation of the coil...

maybe i should use my HVAC guy and have him do the opening for me and go from there.



SouthLake is offline   Reply With Quote
Old 06-03-2017, 10:27 AM   #25
Hvac Pro
 
yuri's Avatar
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 16,129
Rewards Points: 396
Default

Re: No access to HVAC Evaporator Coil


I would recommend you get the HVAC guy AND he should do a proper maintenance checkup. Most important part is to check the freon level which a DIYer cannot do without gauges etc.

The furnace also needs maintenance as there is a flame sensor which needs cleaning. Not that easy to get at or out on that furnace.
__________________
"Cut it twice and it is still too short".

Last edited by yuri; 06-03-2017 at 10:29 AM.
yuri is offline   Reply With Quote
Old 06-03-2017, 10:35 AM   #26
Newbie
 
SouthLake's Avatar
 
Join Date: Jul 2012
Location: Jersey Shore
Posts: 7
Rewards Points: 14
Default

Re: No access to HVAC Evaporator Coil


Thanks,
I have the gauge set from installing and charging my garage Mitsu Mini-Split, but this system is new to me. the mini split is easy...

if he's going to be here to cut access i might as well get him to do everything, but once i have access id like to be able to clean this on my own going forward. im just reluctant to go slicing open the metal with the coil behind it... and that seems to be whats recommended is this thread.
SouthLake is offline   Reply With Quote
Old 06-03-2017, 11:33 AM   #27
Hvac Pro
 
yuri's Avatar
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 16,129
Rewards Points: 396
Default

Re: No access to HVAC Evaporator Coil


You can do it and I can describe it but what's the point if he can do it?

It looks like you have a expensive Signature series furnace and some nice toys so I would get it checked properly and maintained.
__________________
"Cut it twice and it is still too short".
yuri is offline   Reply With Quote
Old 06-03-2017, 02:11 PM   #28
Member
 
Join Date: Nov 2014
Location: Canada
Posts: 4,111
Rewards Points: 8,228
Default

Re: No access to HVAC Evaporator Coil


You should not have to clean a coil after 2 years or ever.

The filter is supposed to keep the system clean.

also the secondary heat exchanger will capture most of the dust, very little will go to the coil.

it's not normal maintenance, it's a repair cause by another problem.

All you need to do is keep the filter and outdoor coil clean, open the blower compartment and check the wheel for dirt buildup.

you can clock the gas meter to check the fuel input and check the temperature split in heating and cooling mode.

once's a system is properly set up you don't need someone year after year on such new equipment.
__________________
My Backround FIY: I am not in the business of any trade or topic I give advise on. I have some have formal education in HVAC + some DIY experience. Theory is not a substitute for experience.
user_12345a is online now   Reply With Quote
Old 06-03-2017, 02:44 PM   #29
Hvac Pro
 
yuri's Avatar
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 16,129
Rewards Points: 396
Default

Re: No access to HVAC Evaporator Coil


Not true.

The fin spacing on the secondary coil is very wide compared to the AC coil so the cooling coil catches dirt fast. Dirt can get on the cooling coil if the filter is not properly maintained but to say a secondary coil works like a filter is nonsense. FYI Carrier uses a plate secondary coil and it catches no dirt.

People invest $6000-$10000 or more in high end HVAC units and like to have maintenance done to catch the unit leaking freon ( if it does ) and have their drains checked etc.

Has nothing to do with the age of the unit.
Wilbits likes this.
__________________
"Cut it twice and it is still too short".

Last edited by yuri; 06-03-2017 at 02:49 PM.
yuri is offline   Reply With Quote
Old 06-03-2017, 03:50 PM   #30
Member
 
Join Date: Nov 2014
Location: Canada
Posts: 4,111
Rewards Points: 8,228
Default

Re: No access to HVAC Evaporator Coil


carrier dropped that design and went to finned stainless due to class action suite and lots of warranty claims, no?

main point being, if the filter is doing it's job, the coil should never have to be pulled in it's life. if the filter is letting dust through the blower wheel and secondary will be dirty as well to an extent, if they're clean the coil should be clean as well. if not maybe coil has dirt too.

likewise if the gas pressure, charge and airflow/fan speed were properly set at factory or in the field, no reason to get those checked year after year.

the owner can clock the gas meter and check temperature rise for heat and if it changes year after year know something is wrong.

likewise, for cooling the owner can check the split once a year with a inexpensive thermometer and even check wetbulb to take humidity into consideration.

If it's leaking "freon" the split will change and owner will know to make call.

it's a lot of money to have someone out every year.

if everything is working right and looks clean, kind of overkill to call someone every year to do a cleaning and checkup on something so new.

Advertisement

__________________
My Backround FIY: I am not in the business of any trade or topic I give advise on. I have some have formal education in HVAC + some DIY experience. Theory is not a substitute for experience.

Last edited by user_12345a; 06-03-2017 at 03:52 PM.
user_12345a is online now   Reply With Quote
Reply


Thread Tools
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HELP!!! How much owe my HVAC repairman? Is he competant? MB1 HVAC 23 02-01-2012 02:42 PM
Lennox HVAC in Watchguard Mode (4+1) onefastwrex HVAC 19 01-10-2012 04:28 PM
Does this look like asbestos wrapping my HVAC register? htabbas HVAC 12 11-22-2011 06:15 AM
HVAC in out Condo Jzone99 HVAC 10 11-21-2009 04:28 AM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1