AC Coil Is A Block Of Ice! How To Fix And Test

Carrier ac keeps freezing up, customer has to run the ac in the winter because of high heat load. I find high static pressure and other problems.
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[@jsfkdkjslfdslfkdj]

Those switches last way longer if you add a relay for the fan and use the switch to break 24v to the coil

[@topher8634]

I agree. You won't be switching as large of a load.

[@tomoliver8498]

You would think the little screw on switches would last longer when switching a relay but I have not had any better luck doing so. After 2 of them failed in a short period of time on the same system I installed a ranco like in this video. Been working fine ever since but I did leave the relay in the circuit.

[@topher8634]

@@tomoliver8498 I don't like the encapsulated switches either. I think the repeated cycling just causes them to fail whether you use a relay/contactor or not. I usually use the Ranco switch combined with a relay for small motors and a contactor for the larger motors. If the motors have sleeves instead of ball bearings then I try to sell the ICM head pressure control kit. Some customers don't want the extra cost even after you explain shortened motor life to them. 🤷‍♂️

[@HVACRSurvival]

I agree 💯👍👍

[@liam3284]

A heat recovery system would do great there, madness there is no economizer.

[@jerzyaheardz6939]

Personally a fan of ICM 333 with the pressure transducer for low ambient fan control back when I was doing HVAC service, used to carry a few for situations like this

[@HVACRSurvival]

We use the Total Line version from Carrier 👍👍

[@jasonjohnsonHVAC]

I like those ICM fan speed controllers...i tend to not use that thermistor that it comes with, and i usually install the optional transducer. Hopefully its a ball bearing motor and not sleeve bearings. Great video as always Rick The vinyl tubing is a great trick to keep from rub outs

[@HVACRSurvival]

We use the Total-Line version, usually these motors are cheap sleeve beings.

[@HughesManHVAC]

Great vid Rick!

[@HVACRSurvival]

Thanks Ryan🤙

[@natepeterson7145]

Dewperheat for superheat bubcool for subcool per hvacr school, another way to remember glide

[@HVACRSurvival]

I like that 👍👍. Whatever makes it easiest for somebody to remember is good with me 🤜🤛

[@WaffleStaffel]

I have a 28 year old Coleman in a manufactured home. It's on life support, and I'm doing manual defrosts, as we're in the PNW and defrost is only needed maybe 15 days out of the year, and I don't like to run the heat strip. A recent snow storm knocked loose the wires I was using to operate the fan and reversing valve from inside, and I was unable to stop the fan for one night, so the coil only half defrosted. Too late to make a long story short, but even with a half inch of ice obstructing all airflow, I guess the heat of the compressor was enough to satisfy, because it wasn't running continuously. This thing has taken a fair amount of abuse and kept running nicely. I won't be too heartbroken if it gives up the ghost, because I'll be able to install a mini split.

[@stevencossaboon3237]

Nice work Rick. Thank you for the knowledge.

[@JoseRodriguez-xh6qo]

Bad ambient control causes ice freeze up traditional ambient control recommended.

[@Eddy63]

Nice little vid Rick ... Thx for posting ...

[@sterlingarcher46]

Over here they have kind of a plastic " serpentin " which is almost like a piece of vinyl tubing but cut in a way that you can wrap it around a capillary tube very easily , and it protects it just as good . It kinda wraps around the cap tube like a cobra snake wraps around its prey , just to illustrate the idea . I don't know what the make is or if there even is a part number for it though ...

[@HVACRSurvival]

I'm pretty sure I know what you're talking about. You see it more with electrical wires

[@thestallion504]

Can you do your MB3 bag setup please? =)

[@scrambler350]

Those capsule switches are just a callback waiting to happen - best to just change them out with an old mechanical switch like you did.

[@HVACRSurvival]

Thanks Mike🤜🤛👍👍

[@scrambler350]

@@HVACRSurvival Used to change the ones out on the units at our local 911 Dispatch annually - now I have them all changed out to the oldschool refer controllers. The capsule ones are definitely quicker to install, but you'll just be back switching them out - especially down here where they're off and on 90% of the time....very few days of sustained cold weather.

[@koreylee611]

Awesome video thanks for posting.

[@marvinsellers4457]

Better safe than sorry my man it’s the little things sometimes that saves you Heart ache

[@HVACRSurvival]

Very True~

[@Bobherry]

Nice video.

[@JuanTodoli]

That Telesin collar seems pretty decent to hold the camera judging for your videos so far. Thinking in buying one 🤔

[@HVACRSurvival]

It also helps having the latest go pro 11

[@JuanTodoli]

@@HVACRSurvival I have the 8 black and the stabilization booster is powerful.

[@zekenzy6486]

Great Video. Thank you for sharing. Is that low pressure switch you replace ? what is do for AC of that unit ? I saw it on refrigeration unit ? How set up differencial and pressure ? I'm new to hvacr

[@HVACRSurvival]

The switch I removed was a switch designed to close on a rise in pressure and open on a drop on pressure. They refer to it as a fan cycle switch, but it can be used for different applications. The purpose is to build pressure on the high side so that the metering device can maintain a normal suction saturated temperature above freezing. Set can be done different ways but essentially you want to keep your suction saturated temperature above freezing.

[@Kangenpower7]

The style of fan cycling switch that you removed looks like it is rated at about 1 amp, or pilot duty, and should have a 24 volt coil that is energized by that fan cycling switch to actually power the fan, thus it can last many years. I would rather have the control you installed, good for about 15 - 20 amps at 240 volts, so will also last for years. A word of caution, I had to replace a compressor on a small heat pump that had a fan cycling switch (looking at the furnace, you do not have a heat pump) and it was because the fan cycling switch kept the outdoor fan off in the heating mode. I installed a relay that was energized when in the heat mode, thus keeping the outdoor fan energized all the time in the heating mode (unless in defrost).

[@HVACRSurvival]

Thanks, yep, I've had to add a bypass relay to heat pumps with fan cycle controls in the past for the reason you mentioned👍👍

[@topher8634]

@@HVACRSurvival I've had to do this too. Some forget that the condenser becomes the evap in heat mode. The ICM head pressure controls feature a heat mode override but I like those Ranco switches too. The sleeve bearing motors don't like short cycles though.

[@jasonjohnsonHVAC]

​@Topher yup...sleeve bearings need to spin at full speed to wick up the oil onto the shaft...then can slow down. The off/on with sleeve bearings will equal a short life span.

[@HVACRSurvival]

@@jasonjohnsonHVAC they can pay me to replace it, since they were the idiots that wanted this kind of system 🤣

[@harrydickson4575]

Nice job 👍👍👍

[@JoseRodriguez-xh6qo]

69 degree temp will cause freeze up.

[@MrAdamd83]

The vrf systems is what that place needs

[@HVACRSurvival]

We have city multi systems at a few places but it's $$$$$, what they need is commercial equipment but these places cut costs everywhere.

[@topher8634]

@@HVACRSurvival yeah they need a mixed air box and economizer at the least. It's ridiculous to be running mechanical cooling when it's cold outside.

[@MrAdamd83]

Where can I buy them brass tees like you used?

[@jasonjohnsonHVAC]

Any supply house. Called swivel tee's. Usually comes in a 3 pack ( JB branded )

[@throttlebottle5906]

mmm, tasty pink cotton candy. I played in 36" deep white cotton candy last week, below that was 3/8" plywood, cellulose blow in and pink cotton candy sheets(bats) and of course I had to run wire middle of joist level in the mix of batts and cellulose. snow shovel, circular saw(plywood) and a lot of cussing. I've yet to quit itching and scratching from it 🤬🤬🤬

[@HVACRSurvival]

😂👍👍

[@topher8634]

They using a fan cycle switch for R22?

[@topher8634]

Never mind. Jumped the gun on the comment. My bad.

[@HVACRSurvival]

🤣👍

[@jls1259]

are you close to east palestine where the train derailment is

[@HVACRSurvival]

Luckily no I'm in the north west corner, that was in the south east corner

[@MrAdamd83]

Do they have returns in each room

[@HVACRSurvival]

This only does the hallway.

[@MrAdamd83]

@@HVACRSurvival oh ok

[@MrAdamd83]

@@HVACRSurvival good job on that particular call I’ll get me some fan pressure controls put on my van asap

[@specialK_hvac]

I'm curious what the parent company of this facility is, it looks quite familiar to me.

[@specialK_hvac]

I saw in another comment you're maybe in the toledo area? I'm definitely thinking this is a Tril property

[@HVACRSurvival]

Not in Toledo, not sure who Tril is, but my videos are here to share and help others in the field, not start problems for my customers.

[@steveblake8766]

194 thumbs up

[@throttlebottle5906]

"Patient rooms" aka "Victim rooms"

[@wonderhomie2011]

👍👍✅

[@eastcoast186]

👍👍👍🇺🇸👀