Moparmike Posted April 24, 2018 Share Posted April 24, 2018 Ok guys went had both my dumps rd688s and rd690 a.c. service 688s blows but not the best 690 does not blow cold at all..both was charged and checked by a shop so I'm thinking that the units are dirty and need cleaning from dust and whatever else..so my question is where do I start and what do I need to remove. To clean the evaporator coil.. Quote Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/ Share on other sites More sharing options...
Moparmike Posted April 24, 2018 Author Share Posted April 24, 2018 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-397516 Share on other sites More sharing options...
Rob Posted April 24, 2018 Share Posted April 24, 2018 PUll the faceplates off from the heater assemblies. You will see both heater core, and a/c evaporator in there. It's usually best and easiest to do a good job if you remove the heater core from the housing to give free access to the area. I take a garden hose and shop vac and wash them clean from inside the truck. Use a bunch of towels but be sure to tell your wife or girlfriend first as they get a little "pissy" seeing all those wet and dirty towels in the wash covered in dirt. 2 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-397518 Share on other sites More sharing options...
hatcity Posted April 24, 2018 Share Posted April 24, 2018 2 hours ago, Rob said: PUll the faceplates off from the heater assemblies. You will see both heater core, and a/c evaporator in there. It's usually best and easiest to do a good job if you remove the heater core from the housing to give free access to the area. I take a garden hose and shop vac and wash them clean from inside the truck. Use a bunch of towels but be sure to tell your wife or girlfriend first as they get a little "pissy" seeing all those wet and dirty towels in the wash covered in dirt. sounds like experience Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-397527 Share on other sites More sharing options...
Rob Posted April 24, 2018 Share Posted April 24, 2018 9 minutes ago, hatcity said: sounds like experience never touched one in my life but you KNOW whom I'm married to..... Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-397529 Share on other sites More sharing options...
Moparmike Posted April 25, 2018 Author Share Posted April 25, 2018 Thank you ill try it this weekend Quote Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-397533 Share on other sites More sharing options...
Danilo Posted February 11, 2022 Share Posted February 11, 2022 On 4/24/2018 at 4:17 PM, Rob said: It's usually best and easiest to do a good job if you remove the heater core from the housing to give free access to the area. can you explain how to remove the heater core? I’m trying to remove mine since mine is super clogged with dirt want to replace it but I can’t get the old one out I already disconnected the hoses from the back and I don’t see any bolts holding it on I don’t know if I missed a bolt but it doesn’t want to come out Quote Link to comment https://www.bigmacktrucks.com/topic/53209-2000-rd-ac-help/#findComment-489165 Share on other sites More sharing options...
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