Compressor delay

[pk]

2 1/2 ton res condensor unit compressor lags fan start by two minutes or so (usually - sometimes starts simultaneously as it should).

What to check? Pressures are normal...

[daytona°]

Brand and Model# would be a great help. So units have a starting kit...some hard start, some thermister and some none

[Zephyr]

Check the crummy "add - on" TDR [if there is one.] Most of them [solid state] fail or time out indefinitely.

[Jeffrey Lebowski]

Check anti-short cycle relay or for the equivalent circuitry on the control card.

[Jeffrey Lebowski]

Curious, what exactly are your pressure readings ?

[Bubba]

Pretty sure you need a new thermostat and low voltage wiring. Sounds like a short has gotten yours out of sync. Bubba

[CJT]

"... as it should?" Who says? It's probably protecting itself from short cycling.

[<kjpro]

Did you read this before you posted it?

[The Freon Cowboy]

[Bob_Loblaw]

So why is the fan energized, but not the compressor?

[The Freon Cowboy]

[Tony]

Check if compressor is attempting to start as fan start but then it doesn&#39;t listen for hum on compressor or click if it has ext.overload like switch this will tell you that compressor is trying to start but it doesn&#39;t if either one of this accrue add hard start kit that may eliminate your problem also if you compressor delaying start when is hot only then definitely add HS kit

[Jake]

I agree with another poster that a model number.. at the very least... would be nice!

Q: I&#39;ve never seen a resi condenser that didn&#39;t start the fan/compressor with a single contactor across the line. I suppose there are VS compressors now on high-end units that would be different (of course)... but I&#39;ve never seen one.

We do control the condenser fan separately in some commercial packages we put together.. with good results, although it&#39;s expensive and requires a lot of controls and VS inside and out. Of course, special attention is needed in the reefer circuit for this to be successful.

Jake

[Noon-Air]

PFM