Suburban Water Heater: “Electric element no heat”
warning RV water heater fault codes
What it means
On gas/electric models, the 120V element produces no heat or water is not hot enough. The element circuit runs from the switch through the ECO and thermostat to the element; a break anywhere, or a burned-out element, stops heating. A burned-out element most often results from energizing it with no water in the tank.
Most likely causes
- Element burned out from being powered with an empty/dry tank (not warranty-covered; user error) most likely
- Tripped 120V breaker or ECO, or the secondary interior electric switch left OFF/pinned common
- Failed electric thermostat not closing the circuit common
- Bad neutral or broken wiring in the 120V circuit less common
- Bypass valve set wrong or diffuser tube misplaced (water present but not heated where expected) less common
Safe checks you can do yourself
- Confirm the tank is full of water before troubleshooting or re-energizing the element.
- Check that both the main and secondary 120V switches are ON and the 120V breaker has not tripped.
- Press the electric (left-hand) ECO reset button under the front cover.
- If you are competent with a multimeter and power is safely isolated, the manual references roughly 10 ohms across a good element (about 8-16 ohms is typical for the 1440W element); confirm 120V is reaching the element terminals before condemning the element.
How to reset / clear Electric element no heat
- Fill the tank completely.
- Turn on both 120V switches and reset the electric ECO.
- If still no heat with 120V confirmed at the element terminals and the water is cool, the element is likely failed and must be replaced.
When to call a technician
120V is confirmed at the element but it won't heat (replace element), the element fails repeatedly, or you are not comfortable working with 120V AC.
Applies to
SW6DE · SW10DE · SW12DE · SW16DE · SW6DEL · SW10DEL · SW12DEL · SW16DEL · SW6PE · SW10PE
FAQ
What does Suburban Water Heater code "Electric element no heat" mean?
On gas/electric models, the 120V element produces no heat or water is not hot enough. The element circuit runs from the switch through the ECO and thermostat to the element; a break anywhere, or a burned-out element, stops heating. A burned-out element most often results from energizing it with no water in the tank.
How do I reset Suburban Water Heater Electric element no heat?
Fill the tank completely. Turn on both 120V switches and reset the electric ECO. If still no heat with 120V confirmed at the element terminals and the water is cool, the element is likely failed and must be replaced.
What is the most common cause of Electric element no heat on a Suburban Water Heater?
The most likely cause is element burned out from being powered with an empty/dry tank (not warranty-covered; user error).
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Sources
- Suburban Water Heater Service & Training Manual — Electric Heating System Sequence of Operation & Troubleshooting (NO HOT WATER / element resistance ~10 Ohms) — Electric Heating System Troubleshooting, p. 18; Operating Instructions for Units with Electric Element, p. 18 (Suburban (Airxcel/RV Comfort), via PDX RV Wholesale)
- Water Heater Troubleshooting & Repair (Suburban) — Testing the 110V Circuit to the Heating Element / Checking Resistance — Troubleshooting Electric Mode, pp. 4-9 (Heartland Owners Forum)
Note: Combination gas/electric (DE/DEL/PE) models only. The factory manual cites ~10 ohms element resistance; field values for the 1440W element commonly read in the 8-16 ohm range. Confirm voltage at the element before replacing.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.