Access For Cleaning "A" Evaporator Coils - DIY Home Improvement, Remodeling & Repair Forum

cliffw · 12-23-2008, 08:21 AM

I have a Ruud central system. Gas heater. Closet installation with air intake below. The A coils are above the unit just below the attic. The A coil compartment was sealed with some type of sealer over tape. I removed some sealer and found a removable opening from which I can see the A coils but, I cannot access the underside of the coils which I am sure need cleaning. I also see a side cover but there is no room to work from there. It sure seems that major disassembly is needed meaning removing the firebox.
Any hints ?

glennjanie · 12-23-2008, 12:57 PM

Hello CliffW:
Many of the larger suppliers of HVAC have an aresol can of chemical that can clean one side of an 'A' coil per can. I think it is called Blaster, Blast Away, or something like that. It can be found at places like Grainger, Johnstone or United Refrigeration.
You will need to place absorbent material on something sturdy under the 'A' coil to catch the crud that will be blown out.
Glenn

cliffw · 12-24-2008, 07:03 AM

Thanks Glenn.
My problem is that I can not access the undersides of the A coil. I would hate to back blow the dirt on top of the burner and definitely do not want to back flush.
Any HVAC sites any are familiar with which might be helpful ?

maui454 · 01-07-2009, 09:33 PM

Do you by chance have a picture of your setup? Is this a furnace with a separate coil or is this a Air handler/heatpump? And you say it is a upflow setup? (return on bottom)

12-23-2008, 08:21 AM	#1
cliffw Junior Member Join Date: Dec 2008 Location: Kerrville Texas Posts: 4	Access For Cleaning "A" Evaporator Coils I have a Ruud central system. Gas heater. Closet installation with air intake below. The A coils are above the unit just below the attic. The A coil compartment was sealed with some type of sealer over tape. I removed some sealer and found a removable opening from which I can see the A coils but, I cannot access the underside of the coils which I am sure need cleaning. I also see a side cover but there is no room to work from there. It sure seems that major disassembly is needed meaning removing the firebox. Any hints ?

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12-23-2008, 12:57 PM	#2
glennjanie Senior Member Join Date: Mar 2006 Location: West Kentucky Posts: 2,999	Hello CliffW: Many of the larger suppliers of HVAC have an aresol can of chemical that can clean one side of an 'A' coil per can. I think it is called Blaster, Blast Away, or something like that. It can be found at places like Grainger, Johnstone or United Refrigeration. You will need to place absorbent material on something sturdy under the 'A' coil to catch the crud that will be blown out. Glenn

12-24-2008, 07:03 AM	#3
cliffw Junior Member Join Date: Dec 2008 Location: Kerrville Texas Posts: 4	Thanks Glenn. My problem is that I can not access the undersides of the A coil. I would hate to back blow the dirt on top of the burner and definitely do not want to back flush. Any HVAC sites any are familiar with which might be helpful ?

01-07-2009, 09:33 PM	#4
maui454 Junior Member Join Date: Jan 2009 Location: Hawaii Posts: 1	Do you by chance have a picture of your setup? Is this a furnace with a separate coil or is this a Air handler/heatpump? And you say it is a upflow setup? (return on bottom)