20 Most Recent Whirlwind FH-778 Air Conditioner Questions & Answers

The compressor needs to be running.Also you need freon charging guages and a pressure temp chart to tell how much you need to add.
If your not sure of anything i said here have a service person do this.You take a risk of damaging the unit and yourself.

Whirlwind FH-778... | Answered on Aug 20, 2018

the thermostat have 2 connection(1 normal open connection and 1 is normal open connection),and it necesary to put your conection on open connection.

Whirlwind FH-778... | Answered on Nov 02, 2017

that depends on the size of the unit and lenght odf the line set.. to give you a general answer your suction pressure should be about 70 PSIG and you liquid line (small line) should be between 245-265 depending on the outdoor temp you will need a set of freon gauges to check this these readings are for an R-22 system if you have R-410a the readings will be much higher

Whirlwind FH-778... | Answered on Apr 13, 2016

on line look for washer dryers parts, lots of hose, just need specs

Whirlwind FH-778... | Answered on Jun 29, 2014

Some HVAC 'experts' install coil lines without a pressure outlet. (ecspecially older units) In which case, you will have to install one. Usually they are located outside very close to the compressor unit on the inflow copper line. If not present, you can chase the lines back to the cooler head in the furnace/cooling unit plenum. It would be visible at some point in the lines if it was installed in the first place.

Whirlwind FH-778... | Answered on Jun 04, 2014

if liquid freon enters compressor it could break the discharge valve which in recip compressors is a reed type valve

Whirlwind FH-778... | Answered on Apr 21, 2014

defrost cycle may be faulty. They are usually simple timers with contacts that change the reversing valve. check to see if the RV is switching

Whirlwind FH-778... | Answered on Apr 21, 2014

No, R12 and R22 are not compatible freons. You need to recharge with R22.

Whirlwind FH-778... | Answered on Apr 12, 2014

Not sure what you need, but try here.

Whirlwind FH-778... | Answered on Dec 08, 2013

Your unit may be going into a defrost cycle. If so sounds like a bad defrost board. It sends a signal to electric heaters inside to come on. Change board and sensor

Whirlwind FH-778... | Answered on Dec 05, 2013

I'm having a similar problem but with a home a/c unit. I had every appliance in the house checked, first, including furnace, but no problems were found. I get similar symptoms, many people can't smell anything, a few can. Someone visiting asked me in September if my furnace was on because it was a slight mechanical/ozone-y smell. I'm about to drop a lot of money on a VOC test because this has been going on for 8 months with no solutions.
It's cold comfort, because I have no solution, but if I figure out what my problem is, I'll post it here, too.

Whirlwind FH-778... | Answered on Oct 26, 2013

Check and make sure the condenser coil is clean and unobstructed.

Whirlwind FH-778... | Answered on Sep 01, 2013

Sounds like a faulty Tstat that's sending a low voltage signal to the contactor coil only sometimes. The high pressure cut out or the compressor's internal thermal protection could of opened, and then closed again after cooling. Make sure the condenser is clean and not obstructed.

Whirlwind FH-778... | Answered on Sep 01, 2013

Sounds like your compressor is locked up or is running under a sevre load you would be best to call a professional

Whirlwind FH-778... | Answered on Aug 13, 2013

First your system is 22 and 134A is a auto AC refrigerant. I have never seen it used in residential ac. I have been in AC business for 45 years. The new refrigerant is 410A or Puron. But you can not use it. Your outside unit is set up for 22. Mix 134A with the oil used in a 22 system is not done. You need to get the correct coil for your system. They are going to make 22 for years. They now have a Drop in for 22 called NU22. I know times are tough but you may have to get a Service Tech anyway.

Whirlwind FH-778... | Answered on Aug 06, 2013

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

224 questions posted

Ask a Question

Usually answered in minutes!

Top Whirlwind Heating & Cooling Experts

Dennis Boxerman

Level 3 Expert

1303 Answers


Level 3 Expert

747 Answers

Paul Carew

Level 3 Expert

3522 Answers

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

Answer questions

Manuals & User Guides

View Most Popular

Whirlwind Heating & Cooling

  • Whirlwind Heating & Cooling

Most Popular Question

heavy exhaust smell from c

  • Heating & Cooling