Advent Air Relay Box | ACRG15 PXXACRG12RB or AACDC PXXAACDCRB

When the thermostat lights up but the rooftop unit never responds, the relay box is the usual culprit. Advent Air Relay Boxes are the OEM control modules that live in the ceiling assembly and switch the compressor and fan.

Fits

• PXXACRG12RB — ACRG15 ceiling assembly (ACM/ACR)
• PXXAACDCRB — AACDC ducted ceiling assembly (AAC)

⚠️ Verify Your Series

Advent has sold several rooftop families: ACM (older R410a units), ACR (current-generation, R32 on 2025 models) and AAC (newest R32 line). Parts are series-specific. Check the model label on your rooftop unit or ceiling assembly before ordering.

Specifications

• Brand: ASA Electronics / Advent
• Type: Digital Relay Box
• Options: PXXACRG12RB (ACRG15); PXXAACDCRB (AACDC)