NO HOT WATER – What to do first –
Which of these problems appear to happen while looking at your water heater: A, B, C D, E, F OR G? Then check you water heater in the order shown.
Follow this list of symptoms and check for these solutions before calling the RV repairperson. I like Dinosaur brand circuit boards.
A. WATER HEATER LOCK OUT – SPARK PRESENT BUT NO GAS FLAME:
1. Low voltage Power supply 10.5 VDC or more.
2. No gas to solenoid valve. Turn on LP gas at the tank.
3. Loose wires to ECO Repair wire connections.
4. Loose wires on solenoid valve. Repair wire connection.
5. Loose valve wire in wiring harness. Repair edge/ harness connections
6. Blocked main burner tube. Clean out burner tube.
7. Blocked main burner orifice. Clean or replace orifice.
8. Dirty connector on circuit board. Clean edge connector.
9. Defective ECO. Replace ECO.
10. Defective circuit board. Replace circuit board.
11. Defective solenoid valve. Replace valve or coil.
12. Gas pressure to high or to low. Set LP pressure @ 11’ water
Column with at least two gas appliances working.
B. WATER HEATER LOCKS OUT – LP GAS PRESENT, BUT NO SPARKING:
1. Dirty electrodes. Clean the electrodes.
2. Improper electrode gap Spark gap should be 1/8 inch.
3. Wire loose in electrode ceramic. Replace electrode.
4. High tension lead wire loose. Repair connection on circuit board
5. Loose electrodes on burner. Secure the electrodes.
6. Cracked ceramic on electrodes. Replace electrode.
7. Defective circuit board. Replace circuit board.
C. WATER HEATER LOCKS OUT – LP GAS AND SPARKS OK.
1. Gas pressure to hi or to low. Adjust LP gas to 11’ water column with at least two gas appliances working.
2. Poor electrical ground Repair ground wire.
3. Improper air adjustment. Adjust air for quiet, blue flame.
4. Dirty electrodes clean off electrodes.
5. Electrodes out of flame pattern. Adjust electrodes.
6. Electrodes sparking to screw – fastening adjust electrodes.
Burner to flue tube.
7. Partly clogged main burner. Clean burner.
8. Gas pressure to hi or to low. Adjust LP gas pressure to 11’ water column with at least two gas appliances working.
9. Partly clogged burner orifice. Clean orifice.
10. Main burner and manifold not aligned. Align gas valve with main burner.
11. Partly opened solenoid valve. Replace the valve.
12. Defective circuit board. Replace circuit board.
D. WATER TEMPERATURE TO HIGH OR TO LOW.
1. Bypass valves in wrong position. Turn valves to correct location.
2. Thermostat not seated against tank. Reseal thermostat.
3. Defective thermostat. Replace thermostat.
E. ERRATIC OR SOOTING BURNER FLAME
1. Air adjustment wrong. Adjust burner air shutter.
2. Poor main burner adjustment. Adjust burner and valve alignment.
3. Flame spreader misaligned. Adjust flame spreader to be square with the end of the burner tube.
4. Blocked burner orifice. Clean orifice – do not use a needle.
5. Main burner obstructed. Clean main burner.
6. Obstructed ‘U’ tube. Clean ‘U’ tube.
7. Exhaust grille blocked. Remove obstruction.
8. Low gas pressure. Adjust LP gas pressure to 11’ water column with at least two gas appliances working.
F. NO SPARKING AND NO LP GAS FLOW:
1. No power Power must be at least 10.5 VDC.
2. Circuit board edge connector dirty. Clean edge connector.
3. Thermal cut-off defective. Replace thermal cut-off.
4. On – Off switch defective. Replace on-off switch.
5. Thermostat defective. Replace thermostat.
G. INTERMITTENT IGNITION- GAS FAILS TO IGNITE:
1. Poor ground at electrodes. Replace or retighten ground screw.
2. Loose ground water on gas valve. Replace or retighten ground screw.
3. Ground screw on the circuit board not tight. Replace or retighten ground screw.
4. Electrode ceramic cracked. Replace electrode.
5. Thermostat chatters or fluctuating. Replace thermostat.
6 Electrode wire insulation damaged. Replace electrode.
RV101byFred.com
Fred Brandeberry