AC Help

[Jyruiz]

Our AC unit works, but only if I hold that part down I have pointed too in the pic. The unit is a Rheem and besides it having an schematic inside, I don't know the model number of the unit, the sticker on it has faded. Any help would be appreciated.

 

[Joker]

Carey, AKA SlowinHavasu fixed ours Friday. Look at ur capacitor and c if it's expanded on the top.

 

[90 Laveycraft]

That is the main contactor, it is controlled by the thermostat in the house. Most are powered by 24 vdc transformer and when powered complete the 240 vac to the compressor and the 120vac to the outside fan.

Id start @ the t-stat or transformer.

 

[TPC]

It's probably your t-stat, but some units have low pressure cut-outs.

If you have an old stat check out what they have at Lowes and move up.

Un-plug the furnace, yeah the furnace, when ya change it out.
Simply mark down the letter of the screw and the color of the wire.
When ya put in the new stat, then plug the furnace back in and run the unit.

 

[Jyruiz]

That is the main contactor, it is controlled by the thermostat in the house. Most are powered by 24 vdc transformer and when powered complete the 240 vac to the compressor and the 120vac to the outside fan.

Id start @ the t-stat or transformer.

The thermostat works with the heat and when I set it to cool, it kicks on the fan but the AC does not come on. Maybe I should call and AC guy, any here on the boards? My place is in La Mirada.

 

[TPC]

Also, the contactor, that's the gadget you're pressing down, sometimes goes bad too.

Not enough silver on the face of the contact points and it goes south, or if it's not the t-stat in your case probably the magnet/spring dealio inside pukes too.

I hate to get someone parts-changing to chase a problem, not the way to do it.

 

[Flying_Lavey]

FIRST, the 2 wires on the side of the contactor are the control connections (coming from the stat). When on there should be 24V across them. With the stat on and it NOT satisfied (above your set point), check for the proper 24V there. If its got 24V there across those 2 wires and the contacts arent closed, the contactor is bad and needs to be replaced. If there isnt 24V there, it could be a few other things in which case you will need to start taking come readings back from the contactor.

 

[TPC]

The thermostat works with the heat and when I set it to cool, it kicks on the fan but the AC does not come on. Maybe I should call and AC guy, any here on the boards? My place is in La Mirada.

Look for broken wires inside the t-stat.
They are very brittle and do break.

Your contactor probably is bad.

Don't touch the screws on the contactor.
You'll never need Viagra once that 220V flows through your Johnson to ground.

 

[digger]

Is that a package unit on the roof or a split system? The way it looks it could just be your contactor is shot.
There may be a safety device in the control circuit that is open and not allowing the control voltage to reach the contactor.
Unless your familiar with electricity / electrical circuits you going need a serviceman to check it out.

 

[TPC]

I no longer have a contract with Johnstone supply, and I dunno know if they sell to the public, but if you take the old contactor in they'll have what you need.

Pull the main breaker/fuse at the outside unit and pull the plug on your furnace before you attempt to remove it.
Or call an A/C guy.

Where you located, maybe one of the guys on the board will stop by and help you out.

They may be really backed up on calls.

 

[Jyruiz]

I no longer have a contract with Johnstone supply, and I dunno know if they sell to the public, but if you take the old contactor in they'll have what you need.

Pull the main breaker/fuse at the outside unit and pull the plug on your furnace before you attempt to remove it.
Or call an A/C guy.

Where you located, maybe one of the guys on the board will stop by and help you out.

They may be really backed up on calls.

I am in La Mirada and I am thinking it is that part as it gets voltage everywhere I put the voltage meter on.

 

[TPC]

I am in La Mirada and I am thinking it is that part as it gets voltage everywhere I put the voltage meter on.

There ya have it.
Make sure to shut off all power before ya remove it if you're going to do it yourself.

The local parts houses may sell you a new one. Dunno if they have those at Home Depot or Lowes.

Best way to approach Johnstone is walk in cold with cash and the old part,, and if put on the spot they'll sell you a new one.

If that doesn't work, tell them you're retired LADWP, can you pay cash and get the contract price.

 

[Jyruiz]

Are you getting 24 Volts through the two WHITE outside wires connected to the white connectors?

I will go home during lunch and double check. Also, do I have to have the T-stat set to cool to make sure it is getting 24V?

 

[where's my keyes ?]

give us a call 800-491-1361 www.rohanandsonsinc.com

 

[TPC]

Are you getting 24 V dc between the two white control wires when the T-stat is calling for cool?

 

[Jyruiz]

give us a call 800-491-1361 www.rohanandsonsinc.com

Who do I ask for?

 

[CampbellCarl]

Who do I ask for?

Ask for the guy that's sitting at his desk posting on RDP's!

 

[Jyruiz]

Ask for the guy that's sitting at his desk posting on RDP's!

Lol, that is who answered the phone.