Question about Heating & Cooling

1 Answer

Tractor a/c not cooling properly

Suction pressure starts ok then drops almost into a vacuum.condenser lines are hot evap cool for a short time

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 340 Answers

Low on freon fix leak clean condenser weekly on a tractor blow it out with compressed air, clean evaporator

Posted on Jun 17, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Noma a/c cq120 makes noise in compressor area and casing is hot to touch. Is compressor going? Is it worth to repair or buy new. I'm guessing this unit is 4 years old or more


Possible Causes There are several reasons for a compressor to run too hot, including high compression ratio, high return gas temperatures, and lack of external cooling.High compression ratios are the result of either lower than normal suction pressures or higher than normal discharge pressures. Changes in suction pressure will affect the compression ratio more rapidly than changes in the discharge pressure. For this reason, it is important to keep the suction pressure at its highest possible value.
Causes of low suction pressure can include incorrect sizing of components, misadjusted or defective metering devices (TXVs), loss of refrigerant charge, plugged driers or strainers, and excessive suction line pressure drop.
Although not as sensitive to change as the suction pressure, the discharge pressure can still greatly affect the compression ratio. Keeping the discharge pressure within normal operating conditions is still important.
Causes of high discharge pressure can include dirty condensing coils, undersized discharge line, a blockage or recirculation of condenser air, erratic condenser fan operation, refrigerant overcharge, noncondensibles in the system, and an undersized condenser.
Many larger refrigeration systems with electronic controllers will automatically monitor the temperature of the discharge line and will send out an alarm to alert the owner or service contractor of a potential problem. Regardless of how the discharge line temperature is monitored, it should always be checked as part of any service to a refrigeration system.
A technician should also check the discharge line temperature within 6 inches from the outlet of the compressor. Any temperature above 225 degrees should be investigated and the cause found and repaired.

Jul 26, 2017 | Refrigerators

Tip

Oasis co4778r if compressor will not start


If the compressor on this case does not start install a set of gauges on unit and make sure pressures for 404a are correct for your ambient temp. at 70F you should have around 155psi on suction and discharge. if pressures are good and no power from relay on emerson board then remove bottom shelves from unit exposing evap fan/txv/coil. you will find a high pressure switch and a low pressure switch. cut wiring to both switchs and ohm them out to make sure they are closed. if one or more is open and your pressures are okay replace the switch. There are dilcores on switches so it can be done with out reclaiming if you are quick. if high pressure switch is faulty and does not open during hot pull downs the unit may trip on internal relief in compressor. 404a will run very high temp and pressure and may shut down up to 5/6 times on hps before unit suction and discharge come down. make sure condenser coil is very clean. wash with hot water and degresser if needed.
General maintence should be carried out on these units often such as cleaning the condenser. cleaning condenser pan and float check proper operation **** all dirt from pan and float with shop vac and wipe up all sluge from heater elements. remove bottom shelves to the evap area and vacuum any loose particals from inside and make sure drain is clear.
if you have product in case that is not keeping cool you may have to remove all shelves and remove back wall and vacuum dust from grates in back to get good air flow.

on Aug 03, 2012 | Oasis Structural Concepts CO4778R-E3...

1 Answer

Low pressure on suction side and no cooling


If your running 134 a your short of gas
if your running 404a your short of gas
check the super heat it should be 5 ktd

Jan 10, 2014 | True TMC-58-DS Commercial Refrigerator

1 Answer

Goodman unit runs and at the a-coil there is a piston where your suction and liquid lines connect. On the liquid side the piston is cold but warm on the other side of piston. A/C unit will not cool.


That piston is the metering device. On the liquid line, before the metering device it is always warm (this is sub cooled, high pressure liquid), but should flash to low pressure, lower temperature vapor once it passes through the metering device. The suction and liquid line never connect together.The liquid line brings liquid from the condenser to the evaporator. The suction line brings super heated vapor from the evaporator to the compressor. Since the unit does run, I'd have to put a gauge on it,but if I had to guess, I'd guess you have high head pressure. Check for dirt or debris on the condenser, check for proper clearance of the condensing unit and check for operation and directional rotation of the condenser fan. This could also be the result of an over charge.

Aug 26, 2013 | Goodman CKL36AR36 Air Conditioner

1 Answer

KitchenAid KSSC42FJS00 not cooling


Have you checked the condenser as i never seen this fridge but it if it has a fan cool condenser and it may need cleaning this will make a difference. Also worst case it maybe short of gas when it is running check the suction side pipe that goes into the compressor it shouldn't be to hot if so maybe it is short. As im Aussie i don't see this monster of a fridge but i hope this helps.

Nov 05, 2012 | Refrigerators

1 Answer

Diverter valve on Hotpoint FFA70 recieves no power, Fridge ok


Bonjour..Your system check (hot cold) is correct. Generally all new refrig/freezers cool only the freezer & bleed cold air off to cool the refrigerator. Most diverter/airflow dampers I have seen are mechanically operated for simplicity & to keep costs down. I would unload freezer and pull the panel off where you see the fan mounted. Go slow, don't drop any screws.You may not get them back. Look at the drain pan under the evap. coil. If it has ice that is built up in layers. Suspect the defrost termination thermostat. If the evap coil is clogged with heavy frost, suspect 1 the defrost timer and 2 the defrost heaters mounted on the evap. coil. Let me know how you make out.

Parts http://www.repairclinic.com/Refrigerator-Parts?s=t-Hotpoint+FFA70-%3d%3da4&z=50

7_11_2012_6_53_37_am.jpg

Jul 02, 2012 | Hotpoint FFA70 Bottom Freezer Refrigerator

2 Answers

1995 3500 Dodge van A/C not cooling properly


it is advisable to check the high pressure side can try to Joanna water condenser with a hose and check the suction pressure and measure the temperature in the ducts through the A / C

Aug 08, 2009 | 1995 Dodge Ram

1 Answer

System not cooling space it cooled once before?


Hi, could be compressor loosing efficiency, i think suction pressure is to high at 85, also it could be moisture in your system, did mechanic replaces filter drier on high side of system , when he replaces evap. install filter drier on liquid line, if there isn't one, also check compressor valve, you can do that by cutting or desoldering the high side from compressor, connect charging port to compressor, conect your gauge charging port, start compressor, pump up to between 150- 200 psi shut off gauge, and leave for about 1 hr. then check pressure, if pressure decreases, then your compressor valve are leaking, if it maintain same pressure, then compressor valve is o/k. you can do same on suction side, this time in vacuum, if it holds vacuum pressure, then valve is o. k, RLA(LRA) lock rotor amps, is amount of amps compressor used to start, but will drop once compressor is running, 11.6 when operating is o/k, does your evap. compatible with condensing unit?, is it right size. check also that you're using right type of freon, check condensing unit & evap labels for right type of freon, make sure they can handle same type of freon. but check compressor valve carefully, i think your comperssor could be loosing it efficiency, compressor could be your problem. good luck.good luck

Aug 07, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Extremely high head and suction pressures


disconnect the blower and turn on the ac.see if the coil frosts evenly.when you had the system open,you should have changed the liquid line drier.

Jul 29, 2008 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

81 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3089 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...