Air Conditioning - Carrier 9200 AC has long delay before start

Any clues as to why the outside 9200 high efficiency compreesor unit and fan will dealy 8, 10, 20 minutes before turning on? House fan kicks on right away when calling for air conditioning. Freon topped off last year, sight glass is clear when running.

Just the fan that is delay start up, or both fan and compressor?

if it's both fan/compressor, you may have a time delay built into the system.. or you may have a "saver switch" on the house that the power company controls..

Now I need a replacement circuit board.

Thanks Jay both fan/compressor would delay before starting. During the day when it was warm out, delay could be 15 minutes, at night when it was cooler outside it would never come on. Houise fan ran continously.

Found that a small circuit board (2" square) with exposed componets was in series with contactor low voltage side. Took lead from circuit board off contactor and took lead to circuit board and installed on contactor. Unit starts right up when calling for air!

Board must be a short cycle time delay and must also de-bounce tstat so compressor isn't hit a few times in a row when someone turns tstat down or something.

Board has some plastic capacitors and resistors etc. Caps looked a little swollen. Where can I get one of these boards?

You could get these from a carrier dealer or wholesaler..

I honestly would just jumper it unless you have a TXV on your coil.

sounds like a TDR and should not be over 15 bucks I would put one back on it. Your local HVAC supply house probably carries a universal that will fit right in. It sounds like you handled this like a pro, good job, just stop doing that you are knocking starving techs out of their beer and cig money LOL.

Thanks DNT1, you nailed it. Part was $19. Once I looked up that a TDR was a Time Delay Relay I knew what to get. Wow, didn't know you had to have a HVAC license to purchase parts!! Once I found a local Carrier parts supply house, they weren't going to sell it to me.
Finally convinced them that I knew a contractor and they would install. Whew! Job complete.

By the way, I repaired a few old style Carririer (1995 'ish) boards that blow in the furnace. Damn fan relay is mounted on a circuit board and load side of relay goes through a printed circuit track instead of a lug/wire out top of relay. Anyway the solder joint on the relay output pins blows, destroying the eyelet on the printed circuit track which ties the soldered relay pin to the copper track.

Relay needs to be removed (it's still good), board cleaned, circuit track scraped to copper, relay installed and a heavy jumper between relay pin and clean copper on track. Beats buying a $200 replacement.

good info on those Carrier boards it is a good feeling to be able to fix and repair your own stuff, as far as the supply houses go it must be a job requirement to have some attitude to work on the sales counter, and they can spot a DIYer from a mile away LOL.