Bryant FA4ANF04200 Operation is intermittent. Some of the time it will go on when set to heat or cool. Other times, it will not turn on. Replaced thermostat. Problem continues. Sounds like defective relay but where is it located?

SOURCE: Defective Thermostat?

well this is a very subjective question. How mechanically adept are you. If you know where to find the replacement OEM part, then its a mater of taking the control panel apart and replacing the wires one at a time from the old thermostat to the new one. It will have a sensor probe that will need to be routed and attached to the coil somewhere. The same place as the old one. make sure the bulb (if it has one) is not damaged. This may go without saying, but make sure the power is off first.

SOURCE: axu heat and outside blower fan run all the time

I can tell you exaclty whats wrong . and it sounds like multipart problems. you have an old RUUD heat pump and its reversing vavle is stuck. without that valve opening it will contantly try to run in refrigerant mode to make heat. and here its 26 degrees, het pumps are only made to be effiient in over 34 degrees and that why your electric heaters in the blower section in an in a closit of unit
continously running up you eectric bill big time. cuses for the reversing valve to stick are sitting along time when it was low on refrigernt. or ust plain shut depending on its age. that cicking is the relay trying to open or close the reversing valve swict to make pressure again. any local guy an fix that one. theyre are kits called hard start kits that they hook up to them that shoot an extra zap of jiuse in it to try to free it up if its not totally lockd up being though that you still hear the relays pulling in and out thats good you may have just caught it in time.

now here is a quick test and possible cure but only if you what your doing turn both units off take off the top cover of the old rudd and get a small hammer not a sledgehammer and rap and tap all around the reversing valve. it will be a cylindrical tube black usually have sets of copper or brass tubings going in the 2 sides of this so dont hit itthat hard it gets dents it and is ruined. look for oil spots which uually means the refrigerant leaked out , and its seized up for good. they try spinning around the big out door fan door fan some. you may have to rock it back and forth Till it braks lose but dont put super human efort int it,

than put it all bak together making sure you connected wires back up right. go in and have you wife eithe watch it or you do it and switch the breker on and off about 8 times to trying to get the cnnectors switches to stay in and if your brave take a well insulated screw driver and hold them in for 2-4 miuntes to force it to work. if that doesnt do it call your local repairman and tell him you need a hard startkit only much safer, the cost about 40$ but you labor will be high if he is sent alone so may you can help im out and lessen your bill if the valve cant be made to work again. you may want start looking for prices with that model and serial number and d shut that electric heater off some one to replace it . I hope I helped you out some no charge ( I dont have my Pay Pal acct. set up yet ) good luck tom.

SOURCE: Bryant Legacy Line air conditioning not blowing cool air..

Your outdoor condenser is in heat mode. Check the wires on the thermostat. Sounds like a small wiring problem and nothing else. Good luck. Please keep me posted as to you progress.

SOURCE: Amana Model PTH153A50AC wont cool or heat

Hi,
Here is a tip about trouble shooting your air conditioner...

Air Conditioner Trouble -Review the Possibilities
http://www.fixya.com/support/r3571569-air_conditioner_trouble_review_the_possi

heatman101

SOURCE: I have a Bryant 661CJ030-E. While in cooling mode

Refrigerants are regulated by the EPA. In order to purchase it, you need an EPA License. If you are low on refrigerant, the leak needs to be found and repaired. This requires special tools.

Additionally, with the information given, it could be an electrical problem. Is the outside fan running, is the compressor running? Your best bet is to call a professional.