Davelux
New Member
I have a 7 year old Amana Hvac system, that just started to cycle on and off out of the blue.
Unit info:
GUVA/GCVA Modle # CF60FCA MFG # P1237210C
Accessory on unit TX410Ao8A
Ztech Controller 2 Zone HVAC W/TE
Totalline Thermostat p374-1100
The unit is a two-stage variable speed heater. The system is set to work at low speed when the air temp is two degrees out of what is called for and high speed when the temp is more that two degrees out of what is called for. It also has a very low speed that runs for a while after the burner/condenser turns off. We only use the one of the zones 98% of the time.
The unit started cycling. The burner kicks on and the fan ramps up to speed but then the fan kicks down into very low speed; the burner stays on. It then attempts to ramp up to speed again maybe achieving low speed for 10 seconds then back to very low speed. The burner never kicks off and no led faults showing.
The amount of time the fan reaches low speed is variable and could be 1 to 40 seconds. Sometimes it cycles like this until it reaches temp. Sometimes it works fine without cycling. Other times it cycles for awhile and then achieves the desired fan speed.
I have tried running the system without the air-filter and checked the system for cleanliness.
My HVAC guy is perplexed and cant find the problem.
Please Help
New symptom
Woke up to the condenser running. No fan inside the house just the outside condenser. The thermostat did not appear to be calling for heat or cool. No red or green light. The thermostat also lost the program settings, they had reset to 0 and the time was wrong. No power outage.
Unit info:
GUVA/GCVA Modle # CF60FCA MFG # P1237210C
Accessory on unit TX410Ao8A
Ztech Controller 2 Zone HVAC W/TE
Totalline Thermostat p374-1100
The unit is a two-stage variable speed heater. The system is set to work at low speed when the air temp is two degrees out of what is called for and high speed when the temp is more that two degrees out of what is called for. It also has a very low speed that runs for a while after the burner/condenser turns off. We only use the one of the zones 98% of the time.
The unit started cycling. The burner kicks on and the fan ramps up to speed but then the fan kicks down into very low speed; the burner stays on. It then attempts to ramp up to speed again maybe achieving low speed for 10 seconds then back to very low speed. The burner never kicks off and no led faults showing.
The amount of time the fan reaches low speed is variable and could be 1 to 40 seconds. Sometimes it cycles like this until it reaches temp. Sometimes it works fine without cycling. Other times it cycles for awhile and then achieves the desired fan speed.
I have tried running the system without the air-filter and checked the system for cleanliness.
My HVAC guy is perplexed and cant find the problem.
Please Help
New symptom
Woke up to the condenser running. No fan inside the house just the outside condenser. The thermostat did not appear to be calling for heat or cool. No red or green light. The thermostat also lost the program settings, they had reset to 0 and the time was wrong. No power outage.
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