When I turn the Lennox Elite Series ac unit on it runs for about 25 to 30 minutes then the exaust motor shuts down, then I turn off unit, wait 15 minutes turn on runs fine for about 25 to 30 minutes and shuts down again. Is there a heat sensor that may be shutting it down, when getting to hot?

Replaced burned blower motor replace relay but unit not working properly (lennox elite a/c heatpump)

replaced burned blower motor replace relay but unit not working properly (lennox elite a/c heatpump)

Unit goes on but relay sounds like it might be shorting