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Apollo HydroHeat Service Check List
IMPORTANT! Disconnect power source before servicing.
| ISSUE |
POSSIBLE CAUSE |
ACTION |
| System Will Not Operate |
|
Service switch turned off |
Turn on |
| Circuit breaker off |
Reset breaker |
| Fuse blown |
Replace |
| System off at thermostat |
Check switches |
| Thermostat defective |
Repair or replace |
| Loose wiring |
Check connections |
| Transformer defective |
Replace |
|
| No Heat |
|
Pilot out |
Relight pilot |
|
Power not on |
Turn on power |
|
Water heater not working |
Check water heater |
|
Pump air bound |
Follow pump venting instructions |
|
Pump seized |
Disassemble and check cause |
|
Check valve stuck |
Remove obstruction |
|
Thermostat defective |
Replace |
|
Incorrect thermostat |
Install correct thermostat (see instructions) |
|
Pump defective |
Replace pump |
|
Pump relay defective |
Replace pump relay |
|
Pump runs no-circulation |
Check for proper installation of:
• Check valves
• Pump
• Piping
• Air vents
• De-pneumatic |
|
Isolation valves "OFF" |
Turn valves "ON" (see instructions) |
|
No water in system |
Fill and vent system properly |
|
Water not circulating |
Check piping for restrictions, air locks or pumping |
|
Pump backwards |
Reinstall properly or switch supply and return pipes |
|
| Insufficient Heat |
|
Water heater thermostat set too low |
Turn control up |
|
Water heater too small |
Install properly sized unit |
|
Filters clogged |
Replace filters |
|
Air handler too small |
Install properly sized unit |
|
Blower speed too low |
Set higher speed |
|
Heat registers closed |
Open registers |
|
De-pneumatic not installed properly |
Install properly (see instructions) |
|
Water heater dip tube not installed correctly |
Install properly (see water heater instructions) |
|
Uninsulated water lines |
Insulate properly |
|
Wall thermostat inoperative |
Repair or replace |
|
Unit panels off |
Reinstall panels |
|
Water lines restricted |
Remove restriction |
|
Ducts loose or blocked |
Repair ductwork |
|
| Not Enough Domestic Hot Water |
|
Water heater control set too low |
Raise setting (see water heater instructions) |
|
System improperly piped |
Re-pipe |
|
Water heater control not adjusted for rated BTU |
Set proper input (see water heater instructions) |
|
Water lines not insulated |
Insulate hot water piping |
|
Draw exceeds recovery rate of water heater |
Reduce rate of draw until heater recovers |
|
Dip tube broken or not installed properly |
See water heater instructions |
|
Water heater undersized |
Replace |
|
| Blower Noisy |
|
Blower wheel scraping sides |
Re-align wheel |
|
Blower wheel not balanced |
Re-balance wheel |
|
Blower wheel loose |
Tighten set screw |
|
Motor shaft bent |
Replace motor |
|
Blower mounting loose |
Tighten screws |
|
Objects in blower wheel |
Remove debris |
|
| Blower Does Not Operate |
|
Defective blower relay |
Replace relay |
|
Transformer bad |
Replace transformer |
|
Motor defective |
Replace motor |
|
Incorrect or loose wires |
Correct wiring |
|
Motor overloaded |
Remove cause of overload |
|
| Fan Operates But No Heat |
|
Pilot out |
Re-light |
|
Pump airbound |
1. Follow start-up procedures
2. Install purge valves |
|
Pump does not run |
1. Check pump relay
2. See pump service information |
|
Pump runs but no circulation |
1. Check for proper installation of:
• Check valves
• Pump (see pump service info)
• Piping
• De-pneumatic
2. Are isolation valves open? |
|
Check valves closed/melted |
Remove obstructions; replace |
|
| Coil Hot During Cooling Cycle |
|
Check valves defective, held open or improperly installed |
Clean or replace |
|
Pump runs |
Check wiring, thermostat |
|
| No Fan During Cooling Cycle |
|
Motor defective |
Replace |
|
Fan relay defective |
Replace |
|
Thermostat defective or miswired |
Repair or replace |
|
Service switch off |
Turn switch on |
|
| Fan Runs Continually While Condensing Unit Cycles, Thermostat In "Auto" Position |
|
Defective thermostat |
Repair or replace |
|
Defective fan relay |
Replace |
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| Insufficient Cooling |
|
Undersized equipment |
Replace |
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Defective condensing unit |
Consult manufacturer’s installation and service instructions |
|
Restricted ductwork |
Remove restriction |
|
Access panels loose |
Re-install |
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Leaks in ductwork |
Repair |
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Consult air conditioning installation and service instructions if your system does not cool properly.
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