Explore answers about Air Handler

I am running a Lennox XP25-048 Heat Pump, a CBK40UHV-048 air

I am running a Lennox XP25-048 Heat Pump, a CBK40UHV-048 air handler, an iComfort S30 Wi-Fi Communicating Thermostat, and 9kw ECB40-9CB electric heat set at a 40F "ambient temperature" lockout. Outside temp = 28F, inside temp = 75F. Humidity = 92%. During the "Defrost" mode the "outside ambient temperature" probe is set so close to the Heat Pump coils that the outside temperature data sent to the thermostat rises by as much as 30F. The "ambient temperature" lockout of 40F is exceeded and the "electrical heat" is terminated, until the "Defrost" mode is completed, and the "outside temperature" data returns below 40F. In the 2 minutes the "Defrost" mode was running, the inside temperature of the house is reduced to at least 73F, or a loss of 2+ degrees. The company that installed the unit reply is, "They all work like that".My question is:Do you have data or information as to how the system should actually operate, or at least someone I can go to to for the information. Lennox technical is nil.BobPhone: (###) ###-####email: ***@******.***

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airheatman

Heating & Air Conditioning Contractor

6 years college

11,102 satisfied customers
This is what the HVAC specialist said that I need done

This is what the HVAC specialist said that I need done besides the new central A/CDo you agree that considering what he says this is needed? I amTalking about the copper wire and duct workThere is currently a 3 ton system from 1994 at the house. It will need just a few things in order to make the system work at its peak performance.The system will need larger sized copper lines to insure that the refrigerant from the condensing uint to the air handler can handle the higher pressures that the new systems operate at without causing extra stress on the equipment (Current copper size is 3/4” x 5/15” and it needs to be 7/8” x 3/8” copper).The other thing that it will need to make the system be as efficient as posable, and reduce a sweating air handler, is to enlarge the return duct and supply duct from the air handler. Right now there is roughly 750 cfm's on both the supply side and return side. A 3-ton system should be moving around 1200 cfm's on both sides. By enlarging the ductwork, there will also be less stress on your coils, blower motor, and compressor.

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gotoman for ac

HVAC Service manager and owner

Associate Degree

5,376 satisfied customers
How does this work is there a cost involved? several weeks,

how does this work is there a cost involved ?JA: I'll do all I can to help. How long have you been dealing with this?Customer: several weeksJA: Do you plan on doing the work yourself?Customer: YesJA: Anything else we should know to help you best?Customer: I don't think so.

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BillyHvac

Journeyman Service Technician

State Licensed Mechanical Contractor

12,368 satisfied customers
I have a Lennox air handler CBS18-26-3P that is making

Hi, I have a Lennox air handler CBS18-26-3P that is making screeching sounds when the heat kicks on or back off. I'm guessing that it's the blower motor. It has a motor part number as 42F4901 on the name plate. I'm seeing prices from $450-$600. That seems to be about 4 times what it should cost. Any source suggestions or other thoughts? I have not disassembled the unit yet. Just another bit of info: This is also part of an R22 AC system that I'd like to update someday as I can't keep a good charge on the system. But, the separate hotwater core and general heating seem to work fine. Thanks - Dan

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532 satisfied customers
I have a heat pump with auxillary heat. I want to install

I have a heat pump with auxillary heat. I want to install Wi-Fi- thermostat and I only have 5 wires, by looking at the control board I was wondering if I could take 18 gauge wire, run it to the C terminal on control board, and run that wire to the thermostat to have my 6th wire. Control board model number is *****JA: Did you double-check the thermostat's settings? And what about the filters?Customer: I have. Rheem unit, blue wire goes to reversing valveJA: Do you plan on doing the work yourself?Customer: yesJA: Anything else we should know to help you best?Customer: I guess anything relative to my situation, never done it before, I just need voltage going to thermostat at this point and c-terminal looks like it has room for another wire

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BillyHvac

Journeyman Service Technician

State Licensed Mechanical Contractor

12,368 satisfied customers
I have a Ruud heat pump that stopped working last night.

I have a Ruud heat pump that stopped working last night. repairman cant' come until tomorrow and it is 9 degrees outside right now. we are freezing, so i am looking for troubleshooting tips on my own to see what I can do to get it warmer inside while i wait. Symptoms are that the unit appears to not have any power but we haven' tripped any circuits and all power is on in the house.JA: Did you double-check the thermostat's settings? And what about the filters?Customer: filters are clean, thermostat is on, says the temp is 55 and unit is on aux heat. it also says the fan is On but no air is blowing at allJA: Do you plan on doing the work yourself?Customer: i was going to attempt it since i have to wait > 24 hrs for a repairman to arrive at my houseJA: Anything else we should know to help you best?Customer: nothing i can think of

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gotoman for ac

HVAC Service manager and owner

Associate Degree

5,376 satisfied customers
Subject 1 of 2 Trane Air Handlers 4tgb... I have dual

Subject 1 of 2 Trane Air Handlers 4tgb... I have dual systems here at the house both systems are down.. Taking one at a time...JA: I'll do all I can to help. How long have you been dealing with this?Customer: This system a few days... the other system I had my HVAC guy on it and his daughter died before he could trace the short in the 24 volts... Both systems at different times had melted one leg of the 60 amp breakers.. That is repaired... Please note that I am an electronic and former senior service engineer for Afga and NASA with little or no experience in HVAC but I can troubleshoot and follow schematics. Here is what I have right now.. After replacing the thermostat, it was acting flaky, now seems to work consistently, everything appears to work... Oh and by the way these have electric coils as aux heat... The relay to the coil is now engaging properly and there is proper voltage to the coils...and the coils measure around 11 ohms with power off so they must be good. I also think they must be good because with fan only my clamp meter indicates .5 amp at the air handler breaker input, but when the thermostat is demanding aux.... the amperage increases to about 10 amps on each leg... But it is still cold as hell and won't go past 57 degrees. This may have been going on for awhile because I noticed the aux stays on for a long time, but in the last few days the outside temp dropped below 20 degrees and the heat exchanger can't keep up with that... so the question is why am I drawing amps because of the coil but they aren't producing heat????JA: Did you double-check the thermostat's settings? And what about the filters?Customer: The hvac dude programmed the thermostat that I borrowed from the other system that was down... what is there to check? the relay to the coils is engaging but no heat, as though there was an open coil, but can't be because of resistance and amp readingsJA: Do you plan on doing the work yourself?Customer: i am tryingJA: Anything else we should know to help you best?Customer: for this side of house no

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gotoman for ac

HVAC Service manager and owner

Associate Degree

5,376 satisfied customers
I have an old GE thermostat and I am installing new

Sir: I have an old GE thermostat and I am installing new programmable thermostat to control the heat and cooling cycles from a remote location Currently the Ge 3aat8ob1a1 thermostat has seven wires R(red) W(white) Y(yellow) G(green) B(blue) O(orange) T(tan) connected to 7 screws. Can you please tell me the function of each wires and what they control in the heat pump and air handler. THANKS: *****

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BillyHvac

Journeyman Service Technician

State Licensed Mechanical Contractor

12,368 satisfied customers
The motor is out on our central heating unit. Model

The motor is out on our central heating unit. Model #FRNCNF030T00ABAA, Serial #1812A70501. Choice Home Warranty has advised us that this unit is still under warrany Please adviseJA: Did you double-check the thermostat's settings? And what about the filters?Customer: Yes. We change the filters every 60 days.JA: Do you plan on doing the work yourself?Customer: NoJA: Anything else we should know to help you best?Customer: I had two technicians, one from Houston Air Comfort the other from Integrity Air check the unit out

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gotoman for ac

HVAC Service manager and owner

Associate Degree

5,376 satisfied customers
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