HVAC Questions? Ask an HVAC Expert for Answers ASAP
are you talking about the three prongs on the compressor
will do that in the morning
my plug on the compressor is a rubber boot type only one way on. Also is there a pressure switch any where on the air handler or furnace unit that could be overriding the compressor. This is a split unit only thing in the condenser unit is the contactor and capacitor. No switch high or low outside are there any inside that may be stopping compressor from engaging.
the reading are 3ohms C to R C to S 3ohms S to R 6ohms
did scratch test of each prong and was infinity
ok question I will have to depress plunger on contact. Do I just unplug fan from capacitor to turn it off The reason is I have to remove fan from top of unit to get to compressor. don't want fan coming on.
I have 240 at the plug. will the compressor come on if the exhaust fan
is not reconnected? if I depress the contactor
I also tried the "cooling" of the compressor with a bag of ice just in case some internal because of heat .
would a hard start kit be worth looking into???
did that test twice between cr and cs and yes it is 240
could I cut the plug boot and put new prongs on the wires
also here is how the wire comes to the plug. yellow from contactor and black from contactor blue from herm on capacitor. Assuming I am correct on volt test. I put prong in connector of plug leading from black and other in blue got somewhere around 240. Next I put the lead in connector on plug with yellow wire going to it and other in blue and got 238-240 . when you line up plug on compressor top two prongs are plugging into black and yellow bottom prong on blue from capacitor.
will check but i believe just roind
Will check in morning if round I would assume I need one type of kit if flat and round a different type.
what gauge wire 8/10/12
The kits come with the proper wire gage, 12 gage for 3.5 tons and under already attached to the terminals... 10 gage over 5 tons.We are looking for brass terminals with a screw in them to clamp them to the posts on the compressor. You may want to take a one inch long sample of the wire with you to the wholesale house so that you can insure the copper wire diameter is the same as what you have.Its a special finely stranded wire. These are short runs so that the sizing is quite a bit smaller than an electricians wire size chart shows for long runs.... the chart that applies here is the 'electrical panel wire size chart'... not your concern however as what is supplied is generally correct... but do check it against a one inch sample of what is in place now.You want a kit with the wires already permanently attached to brass screw clamp type terminals... not any that require any soldering.Phil
I found the terminal kit today but only in 10gauge wire
Can I splice the 10gauge to the exsiting 12 gauge on the plug
Hello again, yes you can use wire nuts to splice the 12 gage wire the 10 gage wire that comes with the new terminal kit. The right size wire nuts are color coded RED.Ideally the new terminals with the 10 gage wires will reach clear to the contactor and the run capacitor and you will not need to do any splicing.Stay in touch as needed, and please do not forget to rate my work for you, its the only way the company pays me from part of your deposit. I will hold the question open without a time limit after you rate my work so far as good or excellent..Thanks
I went to turn on today and could hear the contactor humming so I replaced the contactor.. ... now the thermostat wire do have 24 volts on them they may have grounded out on unit. did that fire transformer of is there a fuse that might be blown?
Hello again.Contactors very often humm when they are operating... thats normal.It will be best if you consult with me a bit before you start changing parts... each parts change introduces another opportunity for error.... if you accidentally bumped one of the 24 volt wires against one of the 240 volt wires it would have burned out the control card inside the blower/ furnace unit... thats a complex fix.The fuse for the 24 volt circuit is inside the furnace/ blower unit that is inside the house...look for an automotive type fuse on the printed circuit card.Look on the wiring diagram glued to the inside of the furnace for more fuses and locate the transformer... use a multi meter to check across the two 24 volt terminals on the transformer, tell me what voltage reads you get. _____________Training on how to repair these units generally involves 2 years at a junior college, and a 2 to 4 year apprenticeship... you can cause a lot of damage to your system and even risk fire hazards by working on your own equipment, especially if you begin changing parts at random.The real problem here, before you shorted out the 24 volt circuit, is getting the dual run capacitor wired correctly... were you able to check that out as I mentioned in my previous posts? if we do first things first, that generally works, if we jump around at random changing other parts it doesn't go as well.Let me know... I am off to a doctors appointment now and will be back this evening until 11 pm west coast of the USA time.Let me know if you have identified the terminals on the new run capacitor, and what the old capacitor micro farad readings were.Phil
Just an update. I ran the terminal kit without a splice. I bought a hard start kit and the compressor is running like a champ.