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HVAC Guys (1 Viewer)

coopersdad

Footballguy
Purchased a house 4 years ago that was built in the70's from an elderly lady that took pretty good care of it. 2 years ago our AC went out in October. HVAC guy came and replaced the capacitor. 2 days later, it went out again. They replaced it again, and no issues until Tuesday.

Came home from work at it was 94 in the house. Different HVAC company came yesterday morning (sent by AHS) and replaced capacitor, cleaned inside and outside coils and added freon. Worked great and cooled house down. Went to bed around 11 last night and we were running good at 75. Woke up this morning at 84. Checked the circuit breaker yesterday and today. AC breaker was ok, but there was one that had tripped both days.

Any ideas. HVAC guy says unit is 10-12 years old, but looks good well taken care of.
 
I assume you've changed your filter inside. But if you haven't, I would start there.

If they added freon, you have a leak somewhere. So depending on how large that leak is, whatever they put in may be leaking out. And if that's the case, that will need to be addressed. I would call them back and ask them if they ran their sniffer around to see if they could find the leak.

What brand of equipment is it?
 
Also, what city do you live in? I may know of a company close by depending on where you are.
Thanks for the response. They came back out and got us back up an running. They checked the pressures after getting the system re-started (high pressure monitor had tripped the system) and the pressures were not returning to normal.

Changed something out on the inside unit that senses something and relays to the outside unit, and then retested. All normal.

After 5 minutes the high pressure sensor tripped the unit off even though the pressures were normal based on their "reader" that was plugged into the unit. Since the unit is 12-15 years old they said that there was not a replacement high pressure monitor made any more, so they by passed the sensor. All running good.

Do I need to be worried that the sensor was bypassed?
 
@coopersdad , what brand of outdoor condenser unit have you got? And do you know any specs about it at all? Do you know the serial number or similar?

If not, that's OK. Can start with the brand and the approximate age of the unit. Want to look up an image of your outdoor condenser unit (or a similar one) and show you an external part of the unit that you can check for a common type of Freon leak.
 
Also, what city do you live in? I may know of a company close by depending on where you are.
Thanks for the response. They came back out and got us back up an running. They checked the pressures after getting the system re-started (high pressure monitor had tripped the system) and the pressures were not returning to normal.

Changed something out on the inside unit that senses something and relays to the outside unit, and then retested. All normal.

After 5 minutes the high pressure sensor tripped the unit off even though the pressures were normal based on their "reader" that was plugged into the unit. Since the unit is 12-15 years old they said that there was not a replacement high pressure monitor made any more, so they by passed the sensor. All running good.

Do I need to be worried that the sensor was bypassed?
Worried in the sense that if there is an actual problem you'll be replacing the compressor if it's damaged by high pressure.
 
my ac condenser recently blew out and blew the fuse as well, **** blows out is only funny when it's @Studs & Duds not so funny when I'm staring at the need for a whole new unit. I can only guess my unit is over 20 years old as it looks old as ****
 
Thanks for the response. They came back out and got us back up an running. They checked the pressures after getting the system re-started (high pressure monitor had tripped the system) and the pressures were not returning to normal.

Changed something out on the inside unit that senses something and relays to the outside unit, and then retested. All normal.

After 5 minutes the high pressure sensor tripped the unit off even though the pressures were normal based on their "reader" that was plugged into the unit. Since the unit is 12-15 years old they said that there was not a replacement high pressure monitor made any more, so they by passed the sensor. All running good.

Do I need to be worried that the sensor was bypassed?
Worried in the sense that if there is an actual problem you'll be replacing the compressor if it's damaged by high pressure.
Yep. These guys are clowns. If they are suggesting high pressure switches aren't available they would be wrong. And what would they have possibly changed out inside? You basically have a furnace, an AC coil, and maybe a TXV or piston depending on what kind of system you have.

A TXV or a piston is a freon metering device inside typically. Sometimes those can get clogged and that can impact performance. If they changed THAT you would know about it because that repair is around $1500 or more.

You are gonna end up losing your compressor. Because it's tripping out on high pressure for a reason.

They still haven't addressed the leak.
 
Basically you only bypass the high pressure sensor IF the customer insists on it because they want cooling. And any service tech worth his salt is going to tell the homeowner:

"well, then you are going to sign my service ticket absolving me of fault if your compressor fails"
 
Thanks for the response. They came back out and got us back up an running. They checked the pressures after getting the system re-started (high pressure monitor had tripped the system) and the pressures were not returning to normal.

Changed something out on the inside unit that senses something and relays to the outside unit, and then retested. All normal.

After 5 minutes the high pressure sensor tripped the unit off even though the pressures were normal based on their "reader" that was plugged into the unit. Since the unit is 12-15 years old they said that there was not a replacement high pressure monitor made any more, so they by passed the sensor. All running good.

Do I need to be worried that the sensor was bypassed?
Worried in the sense that if there is an actual problem you'll be replacing the compressor if it's damaged by high pressure.
Yep. These guys are clowns. If they are suggesting high pressure switches aren't available they would be wrong. And what would they have possibly changed out inside? You basically have a furnace, an AC coil, and maybe a TXV or piston depending on what kind of system you have.

A TXV or a piston is a freon metering device inside typically. Sometimes those can get clogged and that can impact performance. If they changed THAT you would know about it because that repair is around $1500 or more.

You are gonna end up losing your compressor. Because it's tripping out on high pressure for a reason.

They still haven't addressed the leak.
Yes the TXV is what they replaced. It was under my home warranty plan, so I just paid the $100 yesterday. I've got a copy of their work order stating what they did today, so if it does go bad, I'll have some remediation.

Appreciate the feedback. Probably will need need a new unit. If this one can make it through summer/fall I'll be happy.

Can you recommend a good/better/best unit? One story 1900/SQF home in Texas built in the 70's. Furnace in garace "closet" looks to be newer than the AC.
 
Hey @ChiefD, earlier you said there were only a few items inside for an AC system. I am having a guy (also via home warranty) replacing a "valve" on the inside. My regular bi-annual cleaning folks said the freon was low in the system but when the HWA guy came out, he said it was actually a valve problem in that it's not opening wide enough (inside). HWA apparently agrees because they are paying for it, but I'm paying an extra $100 to have something inside insulated which the dude says my cleaning HVAC guy should have caught.

I was surprised when you didn't mention this valve on the inside equipment up thread. Could that be the "TXV" or "piston" you mention?
 
I’d like to purchase a well made gas furnace. House is old AF. ~3,200 SQFT

Also considering replacing the attic A/C (only) and installing a heat pump.

I have an installer.

Can you recommend a top tier and middle tier gas furnace and HP options? I’m in no rush whatsoever.
 
Hey @ChiefD, earlier you said there were only a few items inside for an AC system. I am having a guy (also via home warranty) replacing a "valve" on the inside. My regular bi-annual cleaning folks said the freon was low in the system but when the HWA guy came out, he said it was actually a valve problem in that it's not opening wide enough (inside). HWA apparently agrees because they are paying for it, but I'm paying an extra $100 to have something inside insulated which the dude says my cleaning HVAC guy should have caught.

I was surprised when you didn't mention this valve on the inside equipment up thread. Could that be the "TXV" or "piston" you mention?
Yeah probably the txv valve.

TXV stands for thermal expansion valve.
 

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