[Jrepou]

I have a firstco 24HBXB-HW air handler with a Goodman GSZ130241AB condenser. Problem I have is no blower power. I have tested the blower motor and ohmed it, it's works on all 3 speeds with direct power and ohmed out good. I also replaced the capacitor as it was reading 15% below the 5 mfd the it is rated for. I have low voltage at the board so I belive the transformer is good. When thermostat calls for heat I hear a relay clicking and the condenser outside kicks in then about 30 seconds later another relay click and the pump starts circulating hot water to the coil but I never get power to the blower from the board. Same in A\C mode, relay clicks on with condenser and pipes to cold coil get super cold and freeze over with no blower power. My question is before I replace the board is there a temp sensor or something I'm missing outside in the condenser that is not sending the signal for the blower to start or is it all controlled from the board in the air handler? What sends the signal to start the blower? I attached a pic of the board. Thanks for any help.

 

[supers05]

First of all, let's not run the compressor without the indoor fan working. You'll damage the compressor that way. At your thermostat, select "fan on" instead of "fan auto". If the fan isn't working then, we'll try bypassing the thermostat. You'll need a wire to connect R to G inside the air handler.

I'll look up that model number later.

Cheers!

 

[user_12345a]

if the air handler has a psc motor, check for 240v from the blower tap on the board to neutral.

If the board isn't applying power to the blower with the correct input (24v between g and c, y and c) the board is bad.

 

[Jrepou]

Ok I understand exactly what you are saying, my only question is which termainls are which, there isint even a "Y" at all. My control board is CB201V I attached pics of it and the wiring schematic as well. What's really confusing me is on the schematic they show yellow from thermostat going to brown and labeled as C, but also the green wire is labeled as G but then on the board as C. I'm a bit confused as to what is what. Thanks guys, sorry I'm new at this but I am ussualy pretty good with wires and schematics.

 

[BayouRunner]

You'll have to check voltage at the board from g and c. You should have twenty four volts. If not that is your issue. If you have 24 volts there then it is most likely your board but I would still check the voltage to the motor at that point. If there is no voltage I would replace the board. Some boards particularly on older units do not have a y on the board. If that is the case you would measure from the c on the board to the y junction that is in between the thermostat and the condenser. But since the condenser is coming on we already know that it has 24 volts. Generally the thermostat controls the signal for the motor in cooling but when heating it could be from a sequencer if you have electric heat or a limit switch if you have gas. Newer boards it is usually controlled by the board after a series of operation. I can't read the sideways picture to read the diagram to explain your wiring. Otherwise I would