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Honeywell RTH3100C wiring. (AC is blowing Warm Air Instead of Cold Air)

Honeywell RTH3100C wiring. (AC is blowing Warm Air Instead of Cold Air)

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  #1  
Old 05-28-17, 09:36 PM
J
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Exclamation Honeywell RTH3100C wiring. (AC is blowing Warm Air Instead of Cold Air)

Honeywell RTH3100C wiring. (AC COLD is blowing Warm Air Instead of Cold Air)

I need some help to figure what causing of hot air coming out even though it is set on AC COLD AUTO.

**Actually to be precise, it blows a little bit COLD AIR but after like 3 minutes or that weird sound "like something is getting activated" it stops blowing COLD AIR and then it starts blowing HOT AIR again.**

HEAT IS working fine.

I need help step by step, what tools needed and for safety precaution.

Thanks guys.
 
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  #2  
Old 05-28-17, 10:23 PM
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It sounds like your heatpump is going into defrost mode.
What brand is your outdoor unit?

The O wire looks like it isn't properly inserted.
 
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Old 05-29-17, 08:45 AM
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Here are the pictures. Thanks for the reply.
 

Last edited by PJmax; 05-29-17 at 09:10 AM. Reason: removed un-needed pics
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Old 05-29-17, 09:12 AM
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Those pictures are the hot water heater. I removed them as they are of no help.

Your heat pump is the unit that sits outside and has the compressor in it.
A picture of it won't help. We need the actual make and model number of it.
 
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