How to Diagnose Errors in HubSpot Marketing Workflows

Step 1: Confirm the symptom, not the assumption

Before opening the workflow, get clear on what is actually wrong.

Ask:

• What should have happened?

• What actually happened?

• Which records are affected (one contact, a segment, or everyone)?

Common symptoms include:

• Emails not sending

• Contacts not enrolling

• Properties not updating

• Internal notifications not firing

Avoid jumping straight to fixes. Most workflow errors come from incorrect assumptions about enrolment or timing.

Step 2: Check workflow status and enrolment settings

Open the workflow and confirm:

• The workflow is switched on

• The correct enrolment triggers are set

• Re-enrolment is enabled if required

Things to watch for:

• Enrolment based on a property that is never actually updated

• Re-enrolment turned off when it should be on

• Filters that exclude more contacts than expected

Tip: Always test enrolment rules using a real contact record.

Step 3: Review the workflow history

Workflow history is your best diagnostic tool.

Check:

• Whether the contact enrolled at all

• Where they stopped

• Whether any actions failed

Look for:

• Red warning icons

• Delays that are still running

• Actions skipped due to “criteria not met”

If a contact never enrolled, the issue is almost always enrolment logic, not the actions.

Step 4: Validate property logic and data quality

Most workflow failures come down to data.

Check:

• The property used actually exists on the record

• The value matches exactly (including capitalisation for single-select fields)

• The property is updated before the workflow tries to use it

Common problems:

• Using “contains” when “is equal to” is needed

• Relying on free-text fields instead of dropdowns

• Properties updated by integrations that run after the workflow fires

If the data is wrong, the workflow will behave correctly but look broken.

Step 5: Check timing, delays, and suppression rules

Delays often cause confusion.

Review:

• Date-based delays that rely on empty or past dates

• Time-of-day or business-hours delays

• Suppression lists or goal criteria removing contacts mid-flow

If a contact is “stuck”, it is usually waiting for a condition that will never be met.

Step 6: Review connected assets

If the workflow sends emails or creates tasks, check the connected assets.

Confirm:

• Marketing emails are published

• Email subscription types allow sending

• Tasks are assigned to active users

• Connected lists still exist and are active

A workflow can run perfectly but still fail at the asset level.

Step 7: Test with controlled contacts

Create one or two test contacts and:

• Manually set properties

• Enrol them deliberately

• Watch the workflow history step by step

Do not rely on live leads for testing. Controlled tests make issues obvious and repeatable.

Step 8: Decide whether to fix or redesign

If you find yourself stacking exceptions and if-then branches, stop.

That’s usually a sign the workflow needs simplifying.

As a rule:

• Simple workflows scale better

• Multiple small workflows beat one complex one

• Clear naming beats clever logic

When to escalate

You should escalate or redesign if:

• Multiple workflows interact unpredictably

• The workflow controls revenue-critical processes

• Data sources come from multiple integrations

• Fixing one issue breaks something else

That’s where a proper review saves time and risk.

Need help?

If you’re stuck or want a second pair of eyes, we’ve done this many times before. We can quickly diagnose whether the issue is logic, data, or structure and get things back on track.

This is exactly the kind of thing our consulting credits are designed for.