Can I spray GUNK brand Engine Cleaner or Greased Lightening on the exterior unit of the A/C to clean it? Or, what about regular radiator cleaner from Auto Zone? :o)~
hi let me give tanks to you ,, you did awosome job ,, i learn new things by your video ,, i ask God at lease 200 years you be live and make video to teach people
thanks
I just cleaned a rooftop packaged unit heatpump. I put a garbage can in the house under the air intake after removing the filter and opening the filter door. I took all the panels off of the unit on the roof, sprayed a can of Home Depot coil cleaner on all the coils, indoor and outdoor coils. Hosed them out in reverse of the normal air flow. No water at all came inside. It all went out the condensation drain. I let it dry for a couple of days. Works great now. Great air flow.
I have a question…..When you are hosing down the rooftop ” indoor coil “, whats preventing any water from going inside the building? That pan is not going to catch all of it, kinda a risk you are taking isnt it?
nice vid. i just started HVAC classes and the more vids i watch i start to understand the whole refrigeration cycle. now i going to go clean my own unit.
It is possible that small pieces of trash had become lodged on the inside of the coil. Sometimes, over time, fiberglass from duct-board will deteriorate and find its way to the indoor coil. It can be nearly impossible to get all of it out no matter how well you clean the coil. You might be stuck having to replace the coil.
In a properly working evap. coil, should air be able to flow through the coil easily, with little resistance? I have almost no airflow through mine, even when fan only is on (no a/c, no ice) I just had it “professionally” cleaned with the foam, but still no airflow. How “breathable” should the coil be, and could cleaning it just clog it up more?
I have been an AC tech Since 1974 and have NEVER EVER cleaned a coil from the outside. ALWAYS spray your coils from the inside out to rinse OUT the clogged debris, not push it further into the coil. Reverse the flow of air or water from the direction it flows when it is running.
My company we use Nu-Brite and a power washer. not a hose. On commercial equipment use nu-brite. first I rinse the coil to get rid of the loose stuff. then all apply nu-brite. and spray away. I tell everyone who calls me on the side when their A/C doesnt work to turn power off and spray out side unit with a hose. Works most of the time. I recommend if you have never used Nu-Brite before, call a tech. That stuff is nasty!
October 16th, 2009 at 2:03 pm
thanks for sharing that! I almost hired someone to do something that seems so easy.
October 19th, 2009 at 11:40 pm
I have to be careful about the type of coil cleaners that I use that are in the air stream.
October 23rd, 2009 at 4:11 am
Can I spray GUNK brand Engine Cleaner or Greased Lightening on the exterior unit of the A/C to clean it? Or, what about regular radiator cleaner from Auto Zone? :o)~
October 26th, 2009 at 2:58 am
Thanks. I can use all the help that I can get.
October 27th, 2009 at 1:01 pm
hi let me give tanks to you ,, you did awosome job ,, i learn new things by your video ,, i ask God at lease 200 years you be live and make video to teach people
thanks
October 27th, 2009 at 4:54 pm
Nice going.
October 29th, 2009 at 11:06 am
I just cleaned a rooftop packaged unit heatpump. I put a garbage can in the house under the air intake after removing the filter and opening the filter door. I took all the panels off of the unit on the roof, sprayed a can of Home Depot coil cleaner on all the coils, indoor and outdoor coils. Hosed them out in reverse of the normal air flow. No water at all came inside. It all went out the condensation drain. I let it dry for a couple of days. Works great now. Great air flow.
October 30th, 2009 at 4:20 am
To be honest about it, I’ve never used it.
October 30th, 2009 at 9:08 am
I was using an off brand alkaline based foamer that the school board supplies me with,
October 31st, 2009 at 12:57 am
It takes practice knowing how to use the water hose and the wet vac.
November 1st, 2009 at 10:28 pm
I have a question…..When you are hosing down the rooftop ” indoor coil “, whats preventing any water from going inside the building? That pan is not going to catch all of it, kinda a risk you are taking isnt it?
November 2nd, 2009 at 6:10 am
Oh-one other quick thing….is Zerol Ice lubricant for freon “worth it”? I think that is all the husband is curious about right now
November 2nd, 2009 at 10:53 pm
Hi Dr. Zarkloff - what type of coil cleaner were you using? My husband had a foam cleaner he wasn’t too happy with.
Thank you
November 6th, 2009 at 10:08 am
Thanks for watching. I will.
November 8th, 2009 at 11:38 pm
Thanks for watching. Most people don’t realize how important it is to keep the coils clean.
November 10th, 2009 at 4:26 pm
thanks give us more knowlege
November 11th, 2009 at 5:35 am
nice vid. i just started HVAC classes and the more vids i watch i start to understand the whole refrigeration cycle. now i going to go clean my own unit.
November 13th, 2009 at 11:39 pm
I’m partial to Nu-Calgon.
November 16th, 2009 at 4:51 am
What brand of Alkaline Based Coil Cleaner do you recommend?
November 18th, 2009 at 10:26 am
I want to get a small pressure washer, too.
November 19th, 2009 at 6:34 am
It is possible that small pieces of trash had become lodged on the inside of the coil. Sometimes, over time, fiberglass from duct-board will deteriorate and find its way to the indoor coil. It can be nearly impossible to get all of it out no matter how well you clean the coil. You might be stuck having to replace the coil.
November 21st, 2009 at 4:52 am
In a properly working evap. coil, should air be able to flow through the coil easily, with little resistance? I have almost no airflow through mine, even when fan only is on (no a/c, no ice) I just had it “professionally” cleaned with the foam, but still no airflow. How “breathable” should the coil be, and could cleaning it just clog it up more?
November 23rd, 2009 at 1:02 am
I have been an AC tech Since 1974 and have NEVER EVER cleaned a coil from the outside. ALWAYS spray your coils from the inside out to rinse OUT the clogged debris, not push it further into the coil. Reverse the flow of air or water from the direction it flows when it is running.
November 24th, 2009 at 11:45 am
My company we use Nu-Brite and a power washer. not a hose. On commercial equipment use nu-brite. first I rinse the coil to get rid of the loose stuff. then all apply nu-brite. and spray away. I tell everyone who calls me on the side when their A/C doesnt work to turn power off and spray out side unit with a hose. Works most of the time. I recommend if you have never used Nu-Brite before, call a tech. That stuff is nasty!