Heat Pump Not Heating? A Victoria BC Troubleshooting Guide (2026)
Quick Answer
Short version if your heat pump not heating : start with the simple stuff the thermostat mode and fan setting, the air filter, and the outdoor unit. A lot of “not heating” calls turn out to be a fan set to ‘On,’ a clogged filter, or a normal defrost cycle. Anything involving refrigerant, ice that won’t melt, or electrical faults is a job for a technician. Here’s the gist.
- Check the thermostat: set to ‘Heat,’ the temperature above room temp, and the fan on ‘Auto,’ not ‘On.’
- Check the air filter a clogged filter is the most common cause of weak heat and frozen coils. Replace it if it’s dirty.
- Clear the outdoor unit of snow, leaves, and debris, and check your panel for a tripped breaker.
- Know what’s normal: heat pump air feels lukewarm, not hot, and a short defrost cycle blowing cooler air is healthy.
- Call a technician for refrigerant, a unit frozen solid, a stuck reversing valve, odd noises, or any burning smell.
heat pump not heating ? A Victoria BC Troubleshooting Guide (2026) heat pump not heating ? A Victoria BC Troubleshooting Guide (2026)
If your heat pump Not heating ,
here’s the reassuring news we share with Victoria homeowners all the time: it’s often something simple a thermostat setting, a dirty filter, or behaviour that’s actually completely normal. Before you assume your system is broken, it helps to know that heat pumps work differently from a furnace. The air they deliver is warm but not hot, and they pause to defrost in cold, damp weather. Both can feel like a failure when they aren’t. This guide walks the safe checks you can do yourself, explains what’s normal versus what isn’t, and shows where the line sits between a quick fix and a call to a technician.
We’ll start with the easy do-it-yourself checks, clear up the normal behaviours people mistake for problems, give you a quick symptom table, flag the frozen-unit situation that needs care, and lay out when to call a pro. We’ve been installing and servicing heat pumps across Greater Victoria for years, so this is the same first-step advice we’d give a neighbour on a cold morning.
| Key Takeaways Put simply: most “ heat pump not heating ” problems trace back to thermostat settings, a dirty air filter, a blocked outdoor unit, or a tripped breaker all safe to check yourself. Refrigerant, a unit frozen solid, a stuck reversing valve, and electrical faults are not DIY; those need a technician when heat pump not heating |
- Safe to check yourself: thermostat mode and fan setting, the air filter, the outdoor unit, and the breakers.
- Know what’s normal: lukewarm air and short defrost cycles are healthy heat pump behaviour, not faults.
- Leave to a pro: refrigerant, a solidly frozen unit, the reversing valve, odd noises, and any electrical or burning smell.
Safe Checks to Try Yourself First
Before calling anyone, run through these. They’re all safe, take a few minutes, and they resolve a large share of “ heat pump not heating ” situations. Work through them in order.
1. Thermostat and fan settings
Start at the thermostat. Confirm it’s set to ‘Heat’ (not ‘Cool’ it’s an easy accidental switch) and that the target temperature is above the current room temperature. Then check the fan setting, because this trips a lot of people up: if the fan is set to ‘On’ instead of ‘Auto,’ it keeps blowing air even when the system isn’t actively heating, so you feel room-temperature or cool air and assume the heat pump has failed. Set the fan to ‘Auto’ and the system will only blow when it’s actually producing heat.
2. The air filter
A dirty air filter is the single most common cause of weak heating. When the filter clogs, airflow drops, the system struggles to move heat, the air feels lukewarm, and in bad cases the indoor coil can even frost over and shut things down. Find your filter (at the indoor air handler or return grille), and if it looks grey and packed with dust, replace or clean it. As a rule, inspect it monthly and change it every one to three months more often with pets or in dusty conditions. It’s the cheapest, easiest fix there is.
3. The outdoor unit and breakers
Head outside and look at the outdoor unit. Clear away leaves, snow, and debris, and make sure nothing is piled against it or blocking airflow a smothered unit can’t pull heat from the air. Never pack snow against it. Then check your electrical panel: the indoor and outdoor units are usually on separate breakers, so reset any that have tripped. If a breaker trips again right away, stop and call a technician a repeatedly tripping breaker points to an electrical fault, not a nuisance trip.
What’s Normal vs an Actual Problem
Before you conclude your heat pump is broken, it helps to know two behaviours that are completely normal but often get mistaken for failures. Recognizing them saves a lot of unnecessary worry and the occasional service call.
First, heat pump air is warm, not hot. A heat pump delivers air around 32-38°C, which is cooler than the blast from a gas furnace and can feel lukewarm against your skin especially right at the vent. That doesn’t mean it isn’t working. If your home is steadily reaching the temperature you set, the heat pump is doing its job, just more gently and efficiently than a furnace. Heat pumps warm a home gradually and hold it there rather than blasting hot air in short bursts.
Second, defrost mode is normal and healthy. In Victoria’s cold, damp winter air, a little frost naturally forms on the outdoor coil. Your heat pump periodically runs a short defrost cycle typically 5 to 15 minutes where it briefly reverses to melt that frost. You’ll see steam rising from the outdoor unit, and the indoor air may feel cooler for a few minutes. This is the system protecting itself, not failing. Let it finish and normal heating resumes. A thin frost that the defrost cycle clears is fine; a unit encased in thick ice that never melts is the problem (more on that below).
Quick Troubleshooting Table
Match what you’re seeing to the likely cause and what to do about it. “DIY” means safe to check yourself; “Pro” means call a technician.
| Symptom | Likely Cause | What to Do |
|---|---|---|
| Nothing runs at all | Tripped breaker or power switch off | DIY reset breaker / switch |
| Blowing room-temp air | Fan set to ‘On’, not ‘Auto’ | DIY set fan to Auto |
| Weak / lukewarm heat | Dirty air filter or blocked unit | DIY filter, clear outdoor unit |
| Briefly blowing cool air | Normal defrost cycle | DIY wait it out |
| Heats poorly, set to Cool | Thermostat on wrong mode | DIY switch to Heat |
| Unit frozen solid in ice | Defrost fault or low refrigerant | Pro don’t chip the ice |
| Cools fine but won’t heat | Stuck reversing valve | Pro needs diagnosis |
| Grinding / buzzing / burning smell | Mechanical or electrical fault | Pro shut off, call now |
If the Outdoor Unit Is Frozen Solid
A thin frost that comes and goes with the defrost cycle is normal. But if the outdoor unit becomes encased in a thick block of ice that won’t melt, that’s a real problem usually a defrost-system fault, low refrigerant, or restricted airflow. Here’s how to handle it safely.
If your unit is iced over:
| Do This | Don’t Do This |
|---|---|
| Turn the thermostat to ‘Off’ | Don’t chip ice off with sharp tools |
| Clear snow and debris around the unit | Don’t pour hot water on the coils |
| Let it thaw, or use ‘Emergency Heat’ | Don’t pile snow against the unit |
| Call a technician if ice returns | Don’t keep running a frozen unit |
Chipping at ice can puncture the delicate coil fins and cause expensive damage. Let it melt, and if the unit freezes solid again, that’s your cue to call it points to a fault the defrost cycle can’t fix on its own.
Why does a unit freeze solid? The common causes are a malfunctioning defrost control or sensor that isn’t triggering the melt cycle, restricted airflow from a dirty filter or blocked coil, or low refrigerant. The first you can rule out by checking your filter and clearing the unit; the rest need a technician. Refrigerant in particular is never a DIY job it requires certification and specialized equipment, and low refrigerant always means a leak that needs proper repair, not a top-up.
If you’ve cleared the unit, changed the filter, and given it time to thaw but it still ices up or won’t heat, stop there. Running a frozen heat pump can strain the system and turn a repair into a replacement. That’s the point to bring in a professional.
| Tried the Basics and Still No Heat? We Can Help.If you’ve checked the thermostat, the filter, the outdoor unit, and the breakers and your heat pump still isn’t heating, give us a call. Here’s the part that’s genuinely different: you’ll reach someone who will try to troubleshoot with you over the phone before booking anything. If it’s something simple we can talk you through, you’ve saved yourself a service call. If it does need a technician, our dedicated service team covers Greater Victoria and we’ll get you booked in.Call Heat Savers today: (250) 383-3512 serving Victoria, Saanich, Oak Bay, Langford, Esquimalt & Sidney. |
When to Call a Professional in Victoria
Some problems are genuinely DIY; others are a clear signal to call a qualified HVAC technician. Here’s where that line sits.
| Safe to Try Yourself | Call a Technician |
|---|---|
| Adjusting thermostat mode and fan | Low refrigerant or any refrigerant leak |
| Replacing or cleaning the air filter | Unit frozen solid that won’t thaw |
| Clearing snow / debris from the unit | Heats in cooling but heat pump not heating mode |
| Resetting a tripped breaker once | Breaker that keeps tripping |
| Waiting out a normal defrost cycle | Grinding, buzzing, or burning smell |
Common Mistakes to Avoid
Mistaking normal behaviour for a breakdown. Lukewarm air and short defrost cycles are how heat pumps are supposed to work. If your home is reaching the set temperature, the system is fine don’t call for a repair that isn’t needed.
Chipping ice off a frozen unit. It’s tempting, but sharp tools easily puncture the coil fins and turn a simple defrost issue into an expensive repair. Let ice melt naturally or use the ‘Emergency Heat’ setting, and call if it keeps freezing.
Ignoring a repeatedly tripping breaker. Resetting a breaker once is fine. If it trips again right away, that’s an electrical fault don’t keep resetting it. Shut it off and call a technician heat pump not heating becomes a bigger problem.
Frequently Asked Questions
Why is my heat pump not heating ?
The most common reasons are simple: the thermostat set to ‘Cool’ or the fan set to ‘On’ instead of ‘Auto,’ a dirty air filter restricting airflow, a blocked outdoor unit, or a tripped breaker. Check those first they fix most cases. If the unit is frozen solid, only cools, or makes odd noises, it needs a technician.
Why is my heat pump blowing cold air in heat mode?
Often it’s a normal defrost cycle the system briefly reverses to melt frost off the outdoor coil, blowing cooler air for 5 to 15 minutes. It can also be a fan set to ‘On’ instead of ‘Auto,’ a dirty filter, or the thermostat on ‘Cool.’ If it persists beyond a defrost cycle, low refrigerant or a stuck reversing valve may be the cause, which needs a pro.
Is it normal for heat pump air to feel cooler than a furnace?
Yes. Heat pumps deliver air around 32 -38°C, which is warm but cooler than a gas furnace, so it can feel lukewarm especially at the vent. If your home is steadily reaching the temperature you set, your heat pump is working correctly. It heats gradually and efficiently rather than blasting hot air.
My heat pump is frozen what should I do?
A thin frost cleared by the defrost cycle is normal. If it’s a thick block of ice, turn the thermostat off, clear any snow or debris, and let it thaw or use ‘Emergency Heat.’ Never chip the ice off you can damage the coil. If it freezes solid again, call a technician, as it usually means a defrost, airflow, or refrigerant fault.
| Heat Pump Service Across Greater Victoria If the simple checks didn’t restore your heat, let our technicians take it from here. We install and service heat pumps across Greater Victoria diagnosing the real cause safely, whether it’s a defrost fault, refrigerant issue, or something electrical, and getting your home warm again. Book a service visit online or give us a call, and we’ll sort it out. Visit our showroom: 2519 Government St., Victoria, BC V8T 4P6 Call to book a service call: (250) 383-3512 proudly serving Victoria, Saanich, Oak Bay, Langford, Esquimalt & Sidney. |
from Heat Savers https://heatsavers.ca/heat-pump-not-heating-victoria-bc/
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