Question about Heating & Cooling
When you turn the power ON of the unit.It will show "Water pump" in the display".
If its not showing "water pump"
Then 3 things has to be checked>
1)Check ON/OFF switch right side of heater.
2)Check 120/240 volts for transformer.(Time clock,Circuit breaker,Wire connections)
3)check for 24volts to PC control board.(p6 connector --- 1Yellow and 1 Blue wire).
Any of the one is faulty.
If "service" is displayed on display panel then:---
"SNS" Temperature sensor out of range.Replace Sensor.
Inspect Thermistor wire and Connector at Terminal P1.
For step by step troubleshooting.And still to get very confirmed before replacing any part.Please click on the link show below.In that link check out page number 37 for step by step troubleshooting.
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Posted on Jul 10, 2010
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Posted on Jan 02, 2017
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