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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8327
Experience:  Furnace, A/C and heat pump specialist.
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I have no 24vac to the contactor also the fan doesnt run. model

Customer Question

i have no 24vac to the contactor also the fan doesnt run. model HHP242GK3C any help would be appreciated
Submitted: 2 years ago.
Category: HVAC
Expert:  airheatman replied 2 years ago.
Hello. My name is ***** ***** I'll do my best to help. Let's get started and see what we can do.Check and see if we have 230 volts in and out of contactors when they are engaged.
Customer: replied 2 years ago.
(Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 2 years ago.
yes i have 220 vac to 1 side of contactor. just no 24vac to engage the contactor
Expert:  airheatman replied 2 years ago.
1. I see you have requested a phone call. This is an additional service offer which will cost 65.00 as I will be dedicating my time entirely to you .WE can continue here for unlimited time for no additional fees. Let me know if you want phone call and I can send the offer.
2. Our first step is to check right where the control wire comes into the unit and see if we have the 24v there. If so we need to concentrate on pressure switches, defrost board etc in outdoor unit. If not we will move inside.
Customer: replied 2 years ago.
i have 24vac from inside unit outside. goes to a board. im assuming this is the defrost bd but not sure?? chuck
Customer: replied 2 years ago.
im assuming the board on the outside is the defrost board. is that correct.? thanks chuck
Expert:  airheatman replied 2 years ago.
I am not able to find a diagram or any info based on the model you provided. Can you take a clear pic of the wiring label on unit and post it here?
If you have 24v to unit, but not contactors, it is going to be a pressure switch or board not allowing it to be sent to contactors.
Customer: replied 2 years ago.
ill get the picture tonight and send tomorrow. thanks chuck
Expert:  airheatman replied 2 years ago.
Sounds good Chuck.
Issue is like I say going to most likely be a bad board or a pressure switch is open.
Usually on these units, the pressure switches are also wired into the board (High and low pressure). If one of the pressure switches is open it breaks a circuit in the board and will not allow the 24v out.
If you have a paper clip icon on your page you can attach using that link.Or
You can upload the pictures using the tiny pic site .
Here is a link to the site.
Click on Browse , select the file from your folder.then click UPLOAD NOW.
They will give you a quote to enter in the box to verify you are a human.Enter the quote and click UPLOAD NOW
You will see your picture on right side of screen.
Then copy the link URL for email & IM
Paste that link here on the site.
Customer: replied 2 years ago.
here is the link to the picture..
Expert:  airheatman replied 2 years ago.
If 24v at C and Y, but not coming out at CC to contactors ,lets unplug pressure switch wires and see if we have continuity through the pressure switches.See below