When electric backup heat stops working, or a heat pump system depends on emergency heat for long stretches, a failed heat strip is one of the first components to evaluate. For homeowners in Lake Placid, Highlands County, the decision is usually whether to replace a heat strip, repair a related control or wiring fault, or look at the wider system. This guide explains the common warning signs, the checks you can safely make, what a technician should confirm, and what information to gather before heat strip replacement is scheduled. It is general diagnostic guidance, not a remote diagnosis.
How heat strips fit into a heat pump system
Heat strips, also called electric resistance elements, provide supplemental or emergency heat. Depending on the equipment and control design, they may energize when the heat pump cannot keep up with demand, during a defrost cycle, or when emergency heat is selected manually. They are commonly located in the indoor air handler or furnace section. Because they draw significant electrical current and rely on safety limits, a problem can appear as a strip failure, a breaker trip, a control sequencing fault, or restricted airflow rather than a simple burned-out element.
Warning signs that point toward the heat strips
Several symptoms are worth taking seriously when backup heat is needed:
- Emergency or auxiliary heat runs, but the supply air stays cool or only slightly warm.
- Heat is uneven, with one area warm and another cold, which can suggest that one element in a multi-strip assembly is not operating.
- A breaker trips when backup heat starts.
- Electric use rises sharply during backup heat even though the outdoor unit appears to run normally.
If the heat pump runs but the strips do not, or the strips run but the heat pump does not, that split helps narrow the diagnosis. Testing the outdoor unit separately from the indoor backup heat is part of an accurate evaluation.
Safe checks before service and when to stop
Start with checks that do not require removing panels or touching electrical parts:
- Confirm the thermostat mode, and use emergency or auxiliary heat only when the heat pump is not meeting the need.
- Replace a dirty air filter and clear supply and return grilles, since restricted airflow can trigger safety limits.
- Look at the breaker for the air handler without resetting it repeatedly.
- Write down when the problem happens, how long backup heat runs, and whether outdoor temperatures or defrost activity seem connected.
Do not open the air handler or furnace cabinet, touch heating elements, or bypass a safety limit. Turn the system off and arrange qualified service if you notice a burning or scorched smell, repeated breaker trips, an active water leak, or an unsafe temperature in the home.
What a technician should evaluate
A useful heat strip evaluation confirms the failure instead of replacing parts by guess. A technician would typically:
- Check each element for electrical continuity with the power off, then measure current draw on each stage when it is safe to energize.
- Test high-limit switches, thermal fuses, relays or sequencer contacts, and the wiring to the control board.
- Confirm that the heat call reaches each strip stage and that the blower moves enough air across the elements.
- Verify the model and strip configuration so that any replacement kit matches the equipment.
Findings should show which component failed, what caused it if that can be determined, and whether the failure is likely to recur.
Repair or replace: how to weigh the decision
Replacing a single element can be a reasonable repair when the rest of the heater assembly is sound, the housing and wiring show no heat damage, and a compatible replacement is available for the model. A broader replacement is worth discussing when several elements have failed, the housing or wiring shows heat damage, control parts are failing, or the system is near the end of its expected service life. Compare any estimate against the system age, repair history, how often backup heat has been needed, and the operating cost of continued use.
Heat strip work does not normally involve refrigerant. If the diagnosis shows that refrigerant work is needed, EPA-certified refrigerant handling practices apply when that work is performed. Warranty-aware repair handling may apply when manufacturer coverage remains active, so keep the model information, installation date, and prior service invoices available before work begins.
Information to gather before scheduling
- Indoor and outdoor model and serial numbers, if they can be read safely.
- Heater kit or strip information from the equipment label, if it is visible without opening live components.
- Installation date and any repair, maintenance, or warranty paperwork.
- When backup heat runs, how long it runs, and whether the problem occurs in cold or mild weather.
- Any breaker trips, thermostat codes, unusual sounds, or odors.
Common questions about heat strip replacement
Can I use emergency heat until a technician arrives?
Emergency or auxiliary heat uses the backup heat source and typically costs more to run than normal heat pump operation. Treat it as a short-term measure, keep the air filter clean, and stop if you smell burning or a breaker trips repeatedly.
Can one failed strip be replaced without replacing the whole assembly?
Sometimes. Whether a single element can be replaced depends on how many strips the unit has, the condition of the housing and wiring, and whether a compatible replacement exists for the model. A technician confirms this after testing.
How do I tell a heat strip problem from a heat pump problem?
If emergency heat produces warm air while the heat pump itself does not, the outdoor heat pump or its controls are more likely involved. If the backup heat produces no output at all, the strip circuit, safety limits, or sequencing deserve attention. Only a technician can confirm the cause.
Does a repair affect my manufacturer warranty?
Warranty-aware repair handling may apply when manufacturer coverage remains active. Keep your model information and prior invoices, and ask the technician to list each part replaced.
Is service available outside business hours?
Velocity repair availability is 24/7, including nights and weekends. Same-day dispatch may be available when a technician is available, so describe the symptom and whether backup heat is running when you call.
Next step: If backup heat has stopped working in Lake Placid, contact Velocity to schedule a heat strip evaluation. Ask for the findings, the repair or replacement options, and the scope of work in writing before approving any service.